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低温科学研究センター研究交流会
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東京大学低温科学研究センター
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P-1㟁Ⲵ⛣ືㄏ㉳┦㌿⛣䜢♧䛩䝅䜰䝜ᯫᶫᆺ㔠ᒓ㞟✚య䛾䝔䝷䝦䝹䝒ග྾཰≉ᛶ㻌
Terahertz wave absorption properties of cyanido-bridged metal assemblies showing
charge-transfer phase transition⌮Ꮫ⣔◊✲⛉໬Ꮫᑓᨷ㻌 ኱㉺◊✲ᐊ䚽ᓟᑿౡᕼ, ୰ᯘ⪔஧, ஭ඖ೺ኴ, ୰ᕝᖾ♸, ྜྷΎ䜎䜚䛘, ኱㉺ៅ୍㏆ᖺ䚸ᙜ◊✲ᐊ䛷䛿 CsxMn[Fe(CN)6]y䞉zH2O(CsMnFe)䛜 1.4 THz ௜㏆䛷䝔䝷䝦䝹䝒ග䛾྾཰䜢♧䛩䛣䛸䜢ሗ࿌䛧䛯[1]䚹䛣䜜䛿䚸3 ḟඖ᱁Ꮚ䛾✵㝽䛻㛢䛨㎸䜑䜙䜜䛯㔜ཎᏊ䛷䛒䜛 Cs+䜲䜸䞁䛾䝣䜷䝜䞁䝰䞊䝗᣺ື䛾䛯䜑䚸ᑐᛂ䛩䜛≉ᐃ䛾࿘Ἴᩘ䛾㟁☢Ἴ䛜྾཰䛥䜜䜛䛣䛸䛷⏕䛨䜛䚹ᮏⓎ ⾲ 䛷 䛿 䚸 㔜 ཎ Ꮚ 䛸 䛧 䛶 Rb+ 䜲 䜸 䞁 䜢 ྵ 䜏 䚸 ᗘ ኚ ໬ 䛻 క 䛖 ᵓ 㐀 ┦ ㌿ ⛣ 䜢 ♧ 䛩
Rb0.97Mn[Fe(CN)6]0.99·0.2H2O (Rb0.97MnFe)䛻䛴䛔䛶䛾䝔䝷䝦䝹䝒ග྾཰≉ᛶ䜢ሗ࿌䛩䜛䚹⢊ᮎ⤖ᬗᵓ㐀ゎᯒ䛾⤖ᯝ䚸Rb0.97MnFe 䛿ᐊ ୗ䛷ᅗ 1 䛾䜘䛖䛺ᵓ㐀䜢᭷䛩䜛䛣䛸䛜᫂ ਦ 1:࣪ԻԾ͹ Rb0.97MnFe ͹݃ধ䜙䛛䛻䛺䛳䛯䚹䜎䛯䚸䝔䝷䝦䝹䝒᫬㛫㡿ᇦศගἲ䜢⏝䛔䛶 Rb0.97MnFe 䛾䝔䝷䝦䝹䝒ග྾ ߑଆ཰ ᐃ䜢⾜䛳䛯䛸䛣䜝䚸ᐊ ୗ䛷 1.15 THz 䛻྾཰䜢♧䛧䛯䚹䛣䛾྾཰䛿䚸䝔䝷䝦䝹䝒ග䛻䜘䛳䛶᱁Ꮚ✵㝽୰䛾 Rb+䜲䜸䞁䛾᣺ື䛜ບ㉳䛥䜜䛯䛣䛸䛻⏤᮶䛩䜛䛸⪃䛘䜙䜜䜛䚹䛣䛾྾཰࿘Ἴᩘ䛿᪤ሗ䛾 CsMnFe 䛾྾཰࿘Ἴᩘ䜘䜚ప䛔್䛷䛒䜛䛜䚸Rb+䜲䜸䞁䛿 Cs+䜲䜸䞁䜘䜚䜒༙ᚄ䛜ᑠ䛥䛟䚸࿘ᅖ䛾✵㛫䛜ᗈ䛟䛺䜛䛯䜑䚸⏕䛨䜛᣺ື䛾᣺ᖜ䜒኱䛝䛟䛺䜛䛣䛸䛷 Rb+䜲䜸䞁䛾᪉䛜䜘䜚䜖䛳䛟䜚䛸᣺ື䛩䜛䛯䜑䛸⪃䛘䜙䜜䜛䚹䜎䛯䚸ప ┦䛾 Rb0.97MnFe 䛻䛴䛔䛶䜒ྠᵝ䛾 ᐃ䜢⾜䛳䛯⤖ᯝ䚸1.41 THz 䛷྾཰䜢♧䛧䛯䚹䛣䛾㧗࿘Ἴᩘഃ䜈䛾䝅䝣䝖䛿䚸ప ┦䜈䛾┦㌿⛣䛻䜘䜛⤖ᬗ䛾཰⦰䛻㉳ᅉ䛩䜛䛸⪃䛘䜙䜜䜛䚹ਦ 22:Rb
Rb0.97M
MnFeF ͹࣪ԻԾͲ͹τϧϖϩςޭ‫ٷ‬फηϘέφϩ

[1] S.Ohkoshi, M.Yoshikiyo, A.Namai, K.Nakagawa, K.Chiba, R.Fujiwara, H.Tokoro, Scientific Reports 7, 8088 (2017).

P-2ᒙ≧☢ᛶయ 㻯㼞㻝㻛㻟㻺㼎㻿㼑㻞 䛾 㻹㻮㻱 ᡂ㛗䛸஧ḟඖ☢ᛶ㻌
Molecular-beam epitaxy growth of Cr1/3NbSe2 and its magnetic properties at the twodimensional limitᕤᏛ⣔◊✲⛉䞉≀⌮ᕤᏛᑓᨷ䞉ᒾబ◊✲ᐊ┿ᓥ⿱㈗, Saika Bruno Kenichi, ᯇᒸ⚽ᶞ, ୰㔝໷つ, ྜྷ⏣カ, ▼ᆏ㤶Ꮚ, ᒾబ⩏ᏹ㑄⛣㔠ᒓ䜹䝹䝁䝀䝘䜲䝗(TMDC)䛿ᒙ㛫䛜ᙅ䛔䝣䜯䞁䝕䝹䝽䞊䝹䝇ຊ䛻䜘䜚⤖ྜ䛧䛯ᒙ≧≀≀㉁䛷䛒䜚䚸᭷ᶵศᏊ䜔㑄⛣㔠ᒓ➼䚸ከᵝ䛺ཎᏊ䞉ศᏊ䛾䜲䞁䝍䞊䜹䝺䞊䝅䝵䞁䛜ྍ⬟䛷䛒䜛䚹≉䛻 3d ☢ᛶ䜲䜸䞁䛜䜲䞁䝍䞊䜹䝺䞊䝖䛥䜜䛯 TMDC 䛿䛭䛾☢ᛶ䜲䜸䞁䛾✀㢮䜔⃰ᗘ䛻ᛂ䛨䛯ᵝ䚻䛺☢Ẽ⛛ᗎ┦䜢ᙧᡂ䛩䜛஦䛜▱䜙䜜䛶䛔䜛䚹䛧䛛䛧䛭䜜䜙䛿ᶵᲔⓗ䛺๤㞳䛜ᅔ㞴䛷
䛒䜚䚸2 ḟඖᴟ㝈䛻䛚䛡䜛☢Ẽ≉ᛶ䛿ᮍゎ᫂䛷䛒䜛䚹䛭䛣䛷ᡃ䚻䛿ศᏊ⥺䜶䝢䝍䜻䝅䞊ἲ
(MBE ἲ)䜢⏝䛔䜛஦䛻䜘䜚䚸ཎᏊᒙ䝺䝧䝹䛻䛚䛡䜛䚸☢ᛶ䜲䜸䞁䛾䜲䞁䝍䞊䜹䝺䞊䝅䝵䞁䜢క䛖 TMDC ⷧ⭷䛾స〇䛻ྲྀ䜚⤌䜣䛷䛔䜛䚹ᅗ Cr1/3NbSe2 䛾⤖ᬗᵓ㐀≉䛻ᮏ◊✲䛷䛿䚸䝞䝹䜽䛻䛚䛔䛶㠃ෆᙉ☢ᛶ䛾Ⓨ⌧䛜♧၀䛥䜜䜛 Cr1/3NbSe2[1] (ᅗ 1)䛾㉸ⷧ⭷໬䛻ྲྀ䜚⤌䜣䛰䚹㍺㏦≉ᛶ䞉☢Ẽ≉ᛶホ౯䛾⤖ᯝ䚸Cr ༢ཎᏊᒙ䜢᭷䛩䜛ⷧ⭷ヨᩱ䛻䛚䛔䛶䚸㔠ᒓⓗ䛺㟁Ẽఏᑟᛶ䛸㠃ෆᙉ☢ᛶ䛾Ⓨ⌧䜢ほ䛧䛯䚹ᮏ◊✲ᡂᯝ䛿 XY ᆺ䛾 2 ḟඖᙉ☢ᛶయ䜢ᐇ⌧䛧䛯䜒䛾䛷䛒䜚䚸䝖䝫䝻䝆䜹䝹䛺┦㌿⛣䛷䛒䜛 KT ㌿⛣➼䚸XY ᶍᆺ䛻䛚䛡䜛☢Ẽ⛛ᗎᙧᡂ䛾ヲ⣽䛺ㄪᰝ䜢ྍ⬟䛸䛧䛯䚹Ⓨ⾲䛷䛿ᚓ䜙䜜䛯ヨᩱ䛾☢Ẽ≉ᛶ䛻䛴䛔䛶ヲ䛧䛟⤂௓䛩䜛䚹
[1] A. F. Gubkin et al., J. Appl. Phys. 119, 013903 (2016).
1

P-3           
  Ā ̀    Ā  '$)". %('+ +' %*( &$%#$ % (& $)%'*''$) %$+'( %$+))')#*))$) %$ "'   $)' (+'.
&'%# ( $ %'   $) (& $)%' %$+'( %$ * )% ) ),% #$( %$"")'%$ (   , )  "' ( (& $%' ) $)') %$ '+ %*(". , +  "' (& $)%' %$+'( %$   $. ) (%"" $+'("() $ "$)  *& )%   $# ) )   $)' $ ) ( &'+ %*(,%'! , ''  %*) ) $()'*)*' "*") %$ )% -&" $) -&' #$)"'(*")( %,+')$(*$,($%))!$ $)%%*$)$) (()*.,+ $%'&%'))$(*$ $)%%*'"*") %$$"*"))),%
 #$( %$"*''$)$( ).%+')(& $*#*") %$(*$) %$%)'# "+""*")'(*") $) ('(''$ )()-&' #$)"'(*")'))')$)&'+ %*('(*")"*.
)(#"" +"*, '&'($)()"'$((%)(& $(&" )) $       

P-4反転対称性を有する新規スキルミオン物質における創発磁気輸送現象
               東大工 ，

さきがけ ，東大物性研 ，理研  ，東大東京カレッジ 

吉持遥人 ，高木里奈 ，   ，齋藤開 ，， 
中島多朗 ，十倉好紀 ，関真一郎 スキルミオンはトポロジカルに保護されたスピンの渦構造であり、超高密度で消費電力の少ない情報担体としての応用に向け精力的に研究が行われている。従来、 相互作用がスキルミオンの形成に寄与しており、それゆえに反転対称性の破れた結晶構造が必要であると考えられてきた。しかしながら、近年では反転対称性の保
たれた  化合物において、遍歴電子を介した高次スピン相互作用によるスキルミオンの観測が報告されており[1-3]、大きな注目を集めている。
そこで本研究では、この形成機構に基づいて現在世界最小のスキルミオン径を実現している +! の類縁物質に注目して物性測定を行った。測定の結果、磁化のステップ構造に対応して、ホール抵抗率の磁場依存性に
複数の急峻なピーク構造が確認された。これらの結果は、本物質においてスキルミオン相が実現していることを示すのみならず、一つの物質の相図において複数のスキルミオン相が存在していることを示唆する興味深い結果である。本発表では、ホール抵抗率の特異的な振る舞いや、中性子散乱実験の結果を踏まえた本物質における磁気構造について議論する。
 +(+%"!!&    !() ((*+('%%+&!*!'&)     & #!*+(&'* &'$',  
2

P-5⮬ᕫᙧᡂᆺᙉ☢ᛶ䝖䝫䝻䝆䜹䝹⤯⦕య䜢ྵ䜐䝃䞁䝗䜲䝑䝏ᵓ㐀䛻䛚䛡䜛㻌䝇䜻䝹䝭䜸䞁䛾㟁Ẽⓗほ 㻌㻱㼘㼑㼏㼠㼞㼕㼏㼍㼘㻌㼛㼎㼟㼑㼞㼢㼍㼠㼕㼛㼚㻌㼛㼒㻌㼟㼗㼥㼞㼙㼕㼛㼚㼟㻌㼕㼚㻌㼍㻌㼟㼍㼚㼐㼣㼕㼏㼔㻌㼟㼠㼞㼡㼏㼠㼡㼞㼑㻌㼕㼚㼏㼛㼞㼜㼛㼞㼍㼠㼕㼚㼓㻌㼟㼑㼘㼒㻙㼍㼟㼟㼑㼙㼎㼘㼑㼐㻌㼒㼑㼞㼞㼛㼙㼍㼓㼚㼑㼠㼕㼏㻌㼠㼛㼜㼛㼘㼛㼓㼕㼏㼍㼘㻌㼕㼚㼟㼡㼘㼍㼠㼛㼞㼟㻌ᮾ኱⌮, IACP FES RAS A, Far Eastern Federal Univ. B, ᮾᕤ኱⌮ C, ≀ᮦ◊✲ᶵᵓ D㧗ᇛᣅஓ, ⛅ᒣ஢ኴ, I. A. KibirevA,B, A. V. MatetskiyA,B, ୰すு௓, బ⸨▐ு, ᖹཎᚭ C, ῝⃝ᣅᮁC, బ䚻ᮌὈ♸ D, ᐆ㔝࿴༤ D, 㐲ᒣᬕᏊ䠈ᵽΏຌኴ, A. V. ZotovA,B, A. A. SaraninA,B, 㛗㇂ᕝಟྖ䝖䝫䝻䝆䜹䝹⤯⦕య(TI)䛾ᣢ䛴 spin helical/chiral ≧ែ䛷䛿䚸㟁Ꮚ䛾䝇䝢䞁⮬⏤ᗘ䛜䝖䝫䝻䝆䜹䝹䛻ಖㆤ䛥䜜᪂つ䛺≀ᛶ䛜ᮇᚅ䛷䛝䜛䛣䛸䛛䜙኱䛝䛺ὀ┠䜢㞟䜑䛶䛔䜛䚹≉䛻☢Ẽ⛛ᗎ䛜௜୚䛥䜜䛯 TI(ᙉ☢ᛶ TI: FMTI)䛷䛿䚸ᚑ᮶ほ䛜ᅔ㞴䛷䛒䛳䛯⾲㠃≧ែ䛾 spin chirality 䛾ᛶ㉁䛜䚸ᐇ✵㛫ୖ䛾䝖䝫䝻䝆䜹䝹䛻㠀⮬᫂䛺☢Ẽ䝇䜻䝹䝭䜸䞁(Sk)䛸䛺䛳䛶ほྍ⬟䛷䛒䜛䛸ᥦ᱌䛥䜜[1]┒䜣䛻◊✲䛜䛺䛥䜜䛶䛔䜛䚹ᮏ◊✲䛷䛿䚸䝣䜵䝹䝭‽఩䛾ไᚚ䛜ྍ⬟䛺䚸☢ᛶඖ⣲ Mn 䛜⮬ᕫᙧᡂⓗ䛻༢ཎᏊᒙ䛻㓄ิ䛧䛯 FMTI ᒙ≧≀㉁
Mn(Bi1-xSbx)2Te4 (MnBST, ᅗ 1(a))䛻╔┠䛧䚸䝖䝫䝻䝆䜹䝹䝩䞊䝹ຠᯝ䛾ᐃ䜢㏻䛨

䛶 Sk 䛾ほ 䛻ᡂຌ䛧䛯䚹ᮏ⣔䛷䛿 2 ᒙ䛾 MnBST 䛻ᑐ䛧䛶䝇䝨䞊䝃䞊䛸䛧䛶㠀☢ᛶ
TI 䜢ᑟධ䛧䛯䝃䞁䝗䜲䝑䝏ᵓ㐀䜢స〇䛧䛶㠃㛫཯ᙉ☢ᛶ┦஫స⏝䜢ᢚไ䛧(ᅗ
1(b)(c))䚸䛥䜙䛻䝇䝨䞊䝃䞊ཌ䜢ㄪᩚ䛩䜛䛣䛸䛷䚸MnBST 㛫䛾┦஫స⏝䜢⣔⤫ⓗ䛻ኚᅗ 1. (a)MnBST 䝴䝙䝑䝖ᒙ (b)໬䛥䛫 Sk Ⓨ⌧≧ែ䜢ไᚚ䛩䜛䛣䛸䛻ᡂຌ䛧䚸⮬ᕫᙧᡂᵓ㐀⏤᮶䛾䚸ᚑ᮶䜘䜚䜒䇾㌾☢

ከᒙᵓ㐀 (c)䝃䞁䝗䜲䝑䝏ᵓ㐀ᛶ䇿ⓗ䛺 Sk ⏕ᡂ䜢ほ䛧䛯䚹㻌 [1] K. Yasuda et al. Nat. Phys. 12, 555-559 (2016).

P-6ࢫࣆࣥᾮయ≀㉁ȡ (7 &X &1  ࡟࠾ࡅࡿࢫࣆࣀࣥࣇ࢙࣑ࣝ㠃ࡢ᥈⣴
Search for the Spinon Fermi surface in the spin liquid material, κ-(ET)2Cu2(CN)3
ᕤᏛ⣔◊✲⛉㻌 ≀⌮ᕤᏛᑓᨷ㻌 㮵㔝⏣◊✲ᐊ㻌 ಟኈ஧ᖺΎỈ㻌 ᗣྖ,㻌 ᐑᕝ㻌 ࿴ஓ, ᾆ஭㻌 ⍞⣖,➉ཎ㻌 㝠௓, ᑠ℈ ⰾඔ, 㔝ᮧ㻌 ⫕ᏹୗ㉳ ᩗྐ୕Ꮿ ཌᚿబ䚻ᮌ㻌 Ꮥᙪ,㻌 㮵㔝⏣㻌 ୍ྖ᭷ᶵ≀㉁ ȡ (7 &X &1  ࡣᖖᅽ࡛ࣔࢵࢺ⤯⦕య࡛࠶ࡾࠊ➼᪉ⓗ஧ḟඖ୕ゅ᱁Ꮚ࡜ࡋ࡚⌮ゎࡉࢀࡿࠋᗄఱᏛⓗࣇࣛࢫࢺ࣮ࣞࢩࣙࣥ࡟ࡼࡾࢫࣆࣥᾮయ≧ែࢆᐇ⌧ࡋ࡚࠸ࡿ࡜⪃࠼ࡽࢀ࡚࠸ࡿࡀࠊࢫࣆࣥບ㉳࡟࠾ࡅࡿࢠࣕࢵࣉࡢ
᭷↓ࡀ㆟ㄽࡉࢀ࡚࠸ࡿࠋ☢Ẽບ㉳ࡀࢠࣕࢵࣉࣞࢫ࡞ࢫࣆࣥᾮయࢆㄝ᫂ࡍࡿࣔࢹࣝࡢೃ⿵࡜ࡋ࡚ࢫࣆࣥࡢ⮬⏤ᗘࢫࣆࣀࣥ ࡀࣇ࢙࣑ࣝ㠃ࢆᙧᡂࡋ࡚࠸ࡿ࡜ࡍࡿᥥീࡀ⌮ㄽⓗ࡟ᥦ᱌ࡉࢀ࡚࠸ࡿࠋᮏ◊✲࡛ࡣ ȡ (7 &X &1  ࡟࠾ࡅࡿࢫࣆࣀࣥࣇ࢙࣑ࣝ㠃ࡢ᭷↓ࢆᐇ㦂ⓗ࡟᳨ドࡍࡿࡇ࡜ࢆ┠ⓗ࡜ࡋ࡚☢Ẽ᢬ᢠ ᐃࠊ☢Ẽࢺࣝࢡ ᐃࠊ☢Ẽ⇕㔞ຠᯝ ᐃࠊㄏ㟁⋡ ᐃ࡟ࡼࡾ㔞Ꮚ᣺ືࡢほ ࢆヨࡳࡓࠋ⤖ᯝ࡜ࡋ࡚ᙉ☢ሙ࡟࠾࠸࡚ࡶ㔞Ꮚ᣺ືࡣᚓࡽࢀࡎࠊࢫ
ࣆࣀࣥࣇ࢙࣑ࣝ㠃ࡀᏑᅾࡋ࡞࠸ࡇ࡜ࡀ♧၀ࡉࢀࡓࠋࡲࡓࠊȡ (7 &X &1  ࡣ . ࡟┦㌿⛣ࡲࡓࡣࢡࣟࢫ࣮̿࢜
ࣂ࣮ࡢࡼ࠺࡞≀⌮㔞ࡢ␗ᖖ࡞᣺ࡿ⯙࠸ࡀ࠸ࡃࡘࡶほ┠ⓗ࡜ࡋ࡚ +105ࡉࢀ࡚࠸ࡿࠋࡇࡢࢫࣆࣥᾮయ࡟࠾ࡅࡿ␗ᖖࢆㄪ࡭ࡿࡇ࡜ࢆ

ᐃࢆ⾜ࡗࡓࠋࡑࡢ⤖ᯝ⦆࿴᫬㛫 7 ࡢ㏫ᩘࡀ . ௨ୗ࠿ࡽ . ࡲ࡛άᛶ໬ⓗ࡞᣺ࡿ⯙࠸ࢆ♧ࡋࠊࢫࣆࣀࣥࣇ࢙࣑ࣝ㠃ࡀᏑᅾࡋ࡞࠸ࡇ࡜࡜▩┪ࡋ࡞࠸⤖ᯝࡀᚓࡽࢀࡓࠋ. ࡛ 7 ࡢ㏫ᩘࡀቑ኱ࡋࠊ. ࡟ࣆ࣮ࢡࢆࡶࡘࡇ࡜ࡀศ࠿ࡗࡓࠋ. ௨ୗ࡛Ⓨ㐩ࡋࡓ☢Ẽⓗ࡞ᦂࡽࡂࡀప ࡛ᢚ࠼ࡽࢀࡿࡇ࡜࠿ࡽࠊ. ௨ୗ࡟࠾ࡅࡿ☢Ẽⓗ࡞⤌⧊ࡢᙧᡂࡀ♧၀ࡉࢀࡓ
3

P-7
Synthesis of Fe2-xTi1+xO5 Solid Solution Thin Films by Pulsed Laser Deposition
and Their Magnetic Properties
Tabata/Matsui/Seki Lab, Department of Electrical Engineering and Information Systems,
Graduate School of Engineering
Haining Li (M1), Hiroyasu Yamahara, Munetoshi Seki, Hitoshi Tabata
Iron titanium oxide (Fe2TiO5, pseudobrookite) with orthorhombic structure have been well investigated and its solid
solution (Fe2-xTi1+xO5; FTO) thin films are potential candidates for magnetic semiconductor materials in spintronics. Herein,
we offer a report on the successful fabrication of a series of FTO (0 ≤ x ≤ 0.7) films grown on SrTiO3 (100) substrates bypulsed laser deposition. The single phase with crystal orientation of (230) is revealed in XRD patterns and the changing
proportions of Fe3+ and Fe2+ ions are confirmed and calculated by curve fittings on Fe 2p3/2 peaks in X-ray photoelectron
spectroscopy (XPS). The indirect bandgap energy of insulator Fe2TiO5 is obtained to be about 2.1 eV. The measurementsof Seebeck effect and electrical resistivity show that metallic Fe1.7Ti1.3O5, semiconducting Fe1.5Ti1.5O5 and insulating
Fe1.3Ti1.7O5 were all n-type oxides. The films with higher Ti content x exhibit significant room-temperature ferromagnetic
properties, which is closely related to the different ratios of Fe2+, Fe3+ and Ti4+. It is worth noting that Fe1.5Ti1.5O5 andFe1.3Ti1.7O5 films not only show promising thermoelectric properties with giant Seebeck coefficients, but also own
ferromagnetic behaviors above room temperature (400 K). The results of this research possibly lay a solid foundation for
future cost-effective spintronics applications of FTO films.

P-8㻳㼕㼍㼚㼠㻌㼙㼍㼓㼚㼑㼠㼛㻙㼛㼜㼠㼕㼏㼍㼘㻌㼞㼑㼟㼜㼛㼚㼟㼑㼟㻌㼕㼚㻌㼙㼍㼓㼚㼑㼠㼕㼏㻌㼃㼑㼥㼘㻌㼟㼑㼙㼕㼙㼑㼠㼍㼘㻌㻯㼛㻟㻿㼚㻞㻿㻞ᕤᏛ⣔◊✲⛉≀⌮ᕤᏛᑓᨷ㧗ᶫ◊✲ᐊ㻌 ᒸᮧ჆኱ぢἼᑗ䚸ຍ⸨႐኱䚸⸨௦᭷⤮Ꮚ䚸㔠ᏊⰋኵ䚸ụ⏣⤢ဢ䚸ᮧᮏ୔䚸㔠Ꮚ❳㤿䚸ୖ⏣೺ኴ㑻䚸V. Kocsis䚸㔠⃝┤ஓ䚸⏣ཱྀᗣ஧㑻䚸᫝ᖖ㝯䚸⸨ཎᏹᖹ䚸ሯ㷂ᩔ䚸᭷⏣ுኴ㑻䚸༑಴ዲ⣖䚸㧗ᶫ㝧ኴ㑻The search for the topological materials has been rapidly developed in recent years. In particular, the discovery of the Weyl
semimetal (WSM), which has a pair of the Wey points (WPs) with intense Berry curvature, is the important advance in thisfield. While the WPs in this novel class of materials potentially exhibit various
giant/functional electromagnetic phenomena [1], the direct evidence is still lacking. In
this presentation, we will report the magneto-optical study on the recently discovered
magnetic WSM Co3Sn2S2 with the giant anomalous Hall effect (AHE) [2,3]. The
magneto-optical Faraday/Kerr effect and first-principles calculations reveal that the
optical Hall conductivity spectra are dominated by the interband transition upon the
nodal ring structures and the WPs (Fig. 1), which demonstrates that those electronic
structures play the decisive roles for the giant intrinsic AHE. The magneto-opticalsignals are also exceptionally large compared with the conventional ferromagnetic
metals, which exemplifies the intriguing functionality of the WSM.

Fig.1: Giant optical Hall
conductivity in Co3Sn2S2.


[1] N. P. Armitage, et al., Rev. Mod. Phys. 90, 015001 (2018). [2] E. Liu, et al., Nat. Phys. 14, 1125 (2018). [3] Y. Okamura
et al., Nat. Commun. 11, 4619 (2020).

4

P-9
Novel Approach Towards Luminescent Ratiometric Thermometry Based on the ReAbsorption Effect of Ho(III) Molecular Nanomagnets
Solid State Physical Chemistry Lab, Department of Chemistry, Graduate School of Science
Junhao Wang, Jakub J. Zakrzewski, Mikolaj Zychowicz, Koji Nakabayashi,
Szymon Choazy, and Shin-ichi Ohkoshi
Thanks to the large single-ion magnetic anisotropies and well-structured f electronic levelsof trivalent lanthanide ions (LnIII), molecular materials based on LnIII can often exhibit
functionalities of the single-molecule magnets (SMMs) and luminescent ratiometric
thermometry. In this work, we explored these two functionalities in a series of CN-bridged
d-f dinuclear molecules, {[HoIII(4-pyridone)4(H2O)2][MIII(CN)6]}·xH2O (M = Co, 1; Rh, 2;
Ir, 3) and their respective magnetically diluted samples 1@Y-3@Y. By ac magnetic
characterization, the zero-field SMM behaviors for HoIII center were observed in all samples.
Photoluminescence study on 1@Y-3@Y revealed broad emission band from 4-pyridone)LJ6WUXFWXUHRI

III f-f electronic transitions, giving rise toligand, dented by a series of highly thermal-dependent re-absorption lines of the Hohighly sensitive ratiometric thermometric calibration curves, which is a novel design approach towards optical thermometer.
[1] J. Wang, S. Chorazy, S. Ohkoshi et al., J. Am. Chem. Soc., 142, 3970–3979 (2020).
[2] J. Wang, S. Chorazy, S. Ohkoshi et al., Chem. Sci., 12, 730–741 (2021).

P-10㖡㓟໬≀㧗 ㉸ఏᑟయ YBa2Cu3Oy 䛾ගບ㉳㠀ᖹ⾮≧ែ㻌
Photo-excited nonequilibrium state of a high-temperature superconductor YBa2Cu3Oyᮾ኱⌮ A, 㜰኱⌮ B, ᮾ኱ప䝉C຾ぢ㻌 ᜏኴ A, す⏣㻌 ᳃ᙪ A, ᐑᆏ㻌 ⱱᶞ B, ⏣ᓥ㻌 ⠇Ꮚ B, ᓥ㔝㻌 ு A, C㻌 ㏆ᖺ䚸㖡㓟໬≀㧗㉸ఏᑟయ YBa2Cu3Oy(YBCO)䛻୰㉥እග䝟䝹䝇(Ἴ㛗 15 μm)䜢↷ᑕ䛧䛶㡬Ⅼ㓟⣲䝣䜷䝜䞁䜢ඹ㬆ບ㉳䛩䜛䛸䚸㉸ఏᑟ㌿⛣

ᗘ Tc ௨ୖ䛷䝔䝷䝦䝹䝒(THz)࿘Ἴᩘᖏ䛾 c ㍈ගᏛఏᑟᗘ䛾⹫㒊 σ2(ω)䛜㐣Ώⓗ䛻ቑ኱䛩䜛ᵝᏊ䛜ほ䛥䜜䚸ගㄏ㉳㉸ఏᑟ䛸ゎ㔘䛥䜜䛯[1,2]䚹䛧䛛䛧䚸ྠᵝ䛾 σ2(ω)䛾㐣Ώⓗ䛺ቑ኱䛜㏆㉥እග䝟䝹䝇ບ㉳䛻䜘䛳䛶䜒ほ䛥䜜䚸ᖖఏᑟ≧ែ䛻䛚䛡䜛‽⢏Ꮚ䛸䛩䜛ゎ㔘䛜୺ᙇ䛥䜜䜛䛺䛹[3]䚸YBCO 䛻䛚䛡䜛ගບ㉳≧ែ┦䛾ゎ㔘䛿ᮍ䛰ᐃ䜎䛳䛶䛔䛺䛔䚹䛭䛣䛷ᡃ䚻䛿䚸㉸ఏᑟ⛛ᗎ䛾Ⓨ⌧䜢䝢䝁⛊䛾᫬㛫ศゎ⬟䛷ᐃྍ⬟䛺䝠䝑䜾䝇䝰䞊䝗[4]䜔䝆䝵

䝉䝣䝋䞁䞉䝥䝷䝈䝬ඹ㬆(JPR)[5]䛸䛔䛳䛯㉸ఏᑟ⛛ᗎ䛾㞟ᅋບ㉳䛻㉳ᅉ䛩䜛 THz 㠀⥺ᙧගᏛᛂ⟅䜢⏝䛔䛶䚸ගບ㉳䛻䜘䜛 σ2(ω)䛾㐣Ώⓗ䛺ቑ኱䛾㉳※䜢ゎ᫂䛩䜛䛣䛸䜢┠ᣦ䛧䛯䚹㻌 ୙㊊䝗䞊䝥 YBCO 䛻ᑐ䛧䛶㏆㉥እග䝫䞁䝥䞉THz ཯ᑕ䝥䝻䞊䝤ศග䜢⾜䛖䛸䚸Tc ௨ୗ䛷䛿ගບ㉳䛻䜘䛳䛶 THz ࿘Ἴᩘᖏ䛾཯ᑕ⋡䛻⌧䜜䜛 JPR 䛾࿘Ἴᩘ䛜䝺䝑䝗䝅䝣䝖䛧䚸ᖹ⾮≧ែ䛾㉸ఏᑟ⛛ᗎ䛜◚ቯ䛥䜜䜛䛣䛸䛜䜟䛛䛳䛯䚹୍᪉䚸Tc
௨ୖ䛷䛿䝣䜷䝜䞁ඹ㬆ບ㉳䛾ඛ⾜◊✲ [1,2]䛷ගㄏ㉳㉸ఏᑟ䛸ゎ㔘䛥䜜䛶䛔䜛 σ2(ω)䛾㐣Ώⓗ䛺ቑ኱䜢ほ䛧䛯䚹ㅮ₇䛷䛿䛣䛾ගບ㉳ᚋ䛾㐣Ώⓗ䛺 σ2(ω)䛾ቑ኱䛾㉳※䛻䛴䛔䛶䚸ගບ㉳ᚋ䛾 THz 㠀⥺ᙧගᏛᛂ⟅䛸ྜ䜟䛫䛶㆟ㄽ䛩䜛䚹
[1] W. Hu et al., Nat. Mat. 13, 705 (2014) [2] S. Kaiser et al., Phys. Rev. B 89, 184516 (2014)[3] S. J. Zhang et al., Phys. Rev. X, 10, 011056 (2020) [4] K. Katsumi et al., Phys. Rev. Lett. 120, 117001 (2018)[5] S. Rajasekaran et al., Science 359, 575 (2018)

5

P-11
Gate-controlled two-dimensional carrier transport at the FeOy/SrTiO3 interface
Department of Electrical Engineering and Information Systems, Tanaka-Ohya Group
Theodorus Jonathan Wijaya, Le Duc Anh, Shingo Kaneta-Takada,
Masaaki Tanaka, and Shinobu Ohya
The recently found two-dimensional (2D) hole gas (2DHG), which has an ultrahigh mobility up
to 24,000 cm2/Vs at 2.0 K, and 2D electron gas (2DEG) formed at the FeOy/SrTiO3 (STO)
interface are expected to provide a new platform for oxide-based electronics [1]. Here, using a
back-gate configuration [Fig. 1], we demonstrate for the first time a gate control of the carrier
type and mobility of the 2D carrier gas at this interface. The samples were formed by depositing
Al (1.0 nm)/Fe (0.75 ௅ 4.0 Å) on STO (001) substrates using molecular beam epitaxy. For all thesamples, the carrier type was transformed from n-type to p-type with increasing gate voltage Fig. 1: Schematic crosssectional structure of theabove a threshold value, which varies among samples. This suggests a complicated band structure
AlOx/FeOy/STO samplesof this 2D system. Furthermore, at low temperatures (~3.5 K), these devices exhibit excellent with Al back gate andcontact pads.
transistor features with subthreshold swing values of ~30 mV/dec and on-off ratios of ~108. These
results provide insights into the formation mechanism of the 2DHG at the FeOy/STO interface, as well as highlight thepossibility of high-performance field-effect transistors based on the 2D carrier gas on STO substrates.
[1] L. D. Anh et al., Adv. Mater. 32, 1906003 (2020).

P-12䝖䝫䝻䝆䜹䝹⤯⦕య㻔㻮㼕㻘㻿㼎㻕㻞㼀㼑㻟䠋㉸ఏᑟయ 㻼㼐㼀㼑㻞 ᥋ྜ䛻䛚䛡䜛㠀┦཯㍺㏦⌧㇟ᕤᏛ⣔◊✲⛉䞉≀⌮ᕤᏛᑓᨷ䞉D2(༑಴䞉㔠⃝◊✲ᐊ)ቑᏊ┿, ụ⏣ౡဢ, Ώ㑔❳ኴ, ྜྷぢ㱟ኴ㑻, ᕝᮧ⛱, ሯ㷂ᩔ,
Denis Maryenko, 㧗ᶫᆂ, ᕝ㷂㞞ྖ, ༑಴ዲ⣖䝖䝫䝻䝆䜹䝹⾲㠃≧ែ䝖䝫䝻䝆䜹䝹⤯⦕య䛾⾲㠃䛻䛿䚸䝇䝢䞁-㐠ື㔞䝻䝑䜻䞁䜾䜢క䛖䝕䜱䝷䝑䜽ᆺ䛾 2 ḟඖ≧ែ䛜⌧䜜䜛䚹䝖䝫䝻䝆䜹䝹⤯⦕య䛻㉸ఏᑟయ䜢㈞䜚ྜ䜟䛫䜛䛸䚸㉸ఏᑟయ୰䛾䜽䞊䝟䞊ᑐ䛾౵ධ䛻䜘䜚䝖䝫䝻䝆䜹䝹⤯⦕య䛾⾲㠃≧ែ䛻㉸ఏᑟ䜢ㄏ㉳䛩䜛䛣䛸䛜䛷䛝䜛䚹㉸ఏᑟ㏆᥋ຠᯝ䛻䜘䜚ㄏ㉳䛥䜜䛯䛣䛾㉸ఏᑟ䛿䝖䝫䝻䝆䜹䝹㉸ఏᑟ䛸䛺䜛䛣䛸䛜⌮ㄽⓗ䛻ᣦ᦬䛥䜜䛶䛚䜚[1]䠄ᅗ 1䠅䚸䝖䝫䝻䝆䜹䝹⤯⦕య
(Bi,Sb)2Te3
㉸ఏᑟయ
PdTe2

㟁Ẽⓗ䛻୰ᛶ䛺䝬䝶䝷䝘䝣䜵䝹䝭䜸䞁䛜 ⣒䝁䜰䜔ヨᩱ➃䛻⌧䜜䜛䛸ᮇᚅ䛥䜜⢭ຊⓗ䛻◊✲䛥䜜䛶䛔䜛䚹ᮏ◊✲䛷䛿䚸ศᏊ⥺䜶䝢䝍䜻䝅䞊ἲ䛻䜘䜚స〇䛧䛯䝖䝫䝻䝆䜹䝹⤯⦕య
(Bi,Sb)2Te3䠋㉸ఏᑟయ PdTe2 ⷧ⭷䜢ᑐ㇟䛻䚸㠀┦཯㍺㏦

ᐃ䜢⾜䛳䛯䚹㟁

㉸ఏᑟ䜢ㄏ㉳→ 䝖䝫䝻䝆䜹䝹㉸ఏᑟਦ  ۛંްՎͶΓΖφϛϫζΩϩ
௔ఽ಍͹‫ܙ‬੔͹֕೨ਦɽ

Ⲵ㍺㏦䛾㠀┦཯ᛶ䛸䛿㟁ὶ I 䛾༳ຍ᪉ྥ䛻䜘䜚㟁Ẽ᢬ᢠ R 䛾኱䛝䛥䛜␗䛺䜛䠄R(+I) ≠ R(-I)䠅⌧㇟䛷䛒䜚䚸㏆᥋ຠᯝ䛻䜘䜛䝖䝫䝻䝆䜹䝹㉸ఏᑟయ䛿☢ሙୗ䛷㠀┦཯ᛶ䜢♧䛩䛣䛸䛜⌮ㄽⓗ䛻ᮇᚅ䛥䜜䛶䛔䜛[2]䚹Ⓨ⾲䛷䛿䚸㠀┦཯ᛂ⟅䛾⣔⤫ⓗ䛺ᐃ䛛䜙䚸㉸ఏᑟ㏆᥋ຠᯝ䛻䜘䜚䝖䝫䝻䝆䜹䝹㉸ఏᑟ䛜⏕䛨䛶䛔䜛ྍ⬟ᛶ䛻䛴䛔䛶㆟ㄽ䛩䜛䚹
[1] L. Fu and C. L. Kane, PRL 100, 096407 (2008) [2] S. Hoshino et al., PRB 98, 054510 (2018)

6

P-13
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     


)

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cathodebase materia+ 6 wt% Ir(p lpy)3,)'%,-&$+2)$+$
anode@0.1 mA/cm2

3x#f'?Bhm%k <($i`g+Eat^ixJ`gZt $#2#),-&$+2)$+$
 $  l84*OxT4*Oi`c '+$!. 

theoretical maximum: 20-30%Me  xLK}"`  ($i`gl*O/!=U?Bx
Hec    l"xHZG>.kreg  xI`



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5Me-[5]CMP(R1,2 = H, Me);kP_ubu]X5:lSijegZt^i]@_ucMe    ,/&''+!(!($*,0,31*'!0,'0!!(!/,"$&$*/'!+

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P-14
Nonlinear transport in 2D Rashba superconductor SrTiO3
ᕤᏛ⣔◊✲⛉≀⌮ᕤᏛᑓᨷ ᒾబ◊✲ᐊ 1, UCSB2, ⌮◊ CEMS3,
Central Research Institute of Electric Power Industry4, ᮾ໭኱㔠◊ 5
Yuki Itahashi1, Toshiya Ideue1, Yu Saito1,2, Sunao Shimizu3,4, Takumi Ouchi5,Tsutomu Nojima5, Yoshihiro Iwasa1,3
Polar conductors with Rashba-type spin-orbit coupling is a potential material platform for exotic quantum transport andspintronic functionalities [1,2]. One of their inherent properties is the nonreciprocal transport, where the magnetoresistancebecomes inequivalent between the rightward and leftward current directions, due to
breaking of both spatial inversion and time reversal symmetries. Such a rectification
effect reflecting polar symmetry has been studied at the interface or bulk polar
semiconductor [3,4]. Here we have reported nonreciprocal transport in polar
superconductivity achieved in gated SrTiO3. We found the gigantic enhancement in the
nonlinear resistance in the amplitude and phase fluctuation regions [5]. Also, we discusspossible origins of nonreciprocity in the 2D Rashba superconductor, such asparaconductivity with a parity mixing in the Cooper pairs and rectified vortex motions.
[1] E. Lesne et al., Nat. Mater. 15, 1261–1266 (2016).

[2] R. Ohshima et al., Nat. Mater. 16, 609–614 (2017).

[3] P. He et al., Phys. Rev. Lett. 120, 266802 (2018).

[4] T. Ideue et al., Nat. Phys. 13, 578–584 (2017).

[5] Y. M. Itahashi et al., Sci. Adv. 6, eaay9120 (2020).

7

P-15
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        

       

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$#//,*%+#1'! #&3',/01/,,*1#*-#/12/#00&,4+'+'%&#') #/1"*-'+%      !,+01+140"#1#/*'+#"08  61&#*#02/#*#+1,$#)#!1/,+0-'+/#0,++!#      & $%%%(!,)+''#+&# %& ' * &"!,)+''#"  ,"++&# %& ' , &"   

P-16
Pb 䝗䞊䝥 SrRuO3 ⷧ⭷䛻䛚䛡䜛ᙉ☢ᛶ䛸␗ᖖ䝩䞊䝹ຠᯝ䛾┦㛵㻌
Evolution of ferromagnetism and anomalous Hall effect in Pb doped SrRuO 3 thin films
ᕤᏛ⣔◊✲⛉䞉≀⌮ᕤᏛᑓᨷ䞉ᕝ㷂◊✲ᐊᙇ㻌 ⅋㣕䚸⸨⏣㻌 ㈗ၨ䚸ᕝ㷂㻌 㞞ྖᗘ䜢ᣢ䛴㐢Ṕᙉ☢ᛶయ䛷䛒䜚䚸A 䝃䜲䝖䛻 Ca2+䚸Ba2+䜢
ᗘ䛾ኚ

4
-3

䝗䞊䝥䛩䜛䛣䛸䛷☢Ẽⓗ䛺ᛶ㉁䛜ኚ໬䛩䜛䛣䛸䛜▱䜙䜜䛶䛔䜛[1]䚹䛭䛾㌿⛣

6
σ AHE/σ xx (10 )SrRuO3 䛿 160 K 䛾㌿⛣໬䛿᱁Ꮚ䛾య✚䜔 RuO6 䛾ṍ䜏䛻ᙉ䛟㛵ಀ䛧䛶䛔䜛䛸⪃䛘䜙䜜䛶䛔䜛䚹୍᪉䚸䜲䜸䞁༙ᚄ䛜 Sr2+䛸 Ba2+䛾㛫䛻䛒䜛 Pb2+䜢䝗䞊䝥䛩䜛䛸䚸඲䝗䞊䝥㡿ᇦ䛷ᙉ☢ᛶ䛸䛺䜛 Ba2+䝗䞊䝥䛾ሙྜ䛸䛿␗䛺䜚䚸ᙉ☢ᛶ┦䛜⣙ 60%䝗䞊䝥䛾᫬䛻ᾘኻ䛩䜛䛣䛸䛜䝞䝹䜽ከ⤖ᬗ䛻䜘䛳䛶ሗ࿌䛥䜜䛶䛔䜛[2]䚹ᮏ◊✲䛷䛿䚸Sr1-xPbxRuO3 ༢⤖ᬗⷧ⭷䜢స〇䛧䚸䛭䛾ᙉ☢ᛶ┦䛚䜘䜃☢Ẽ㍺㏦≉ᛶ䚸≉䛻␗ᖖ䝩䞊䝹ຠᯝ䛾ኚ໬䜢ホ౯䛧䛯䚹
⦪᢬ᢠ䛾

2
0
x=0
0.06
0.11
0.24
0.33
0.42
0.63

-2
-4
-6

-8
-10
0

50

100

150

Temperature (K)ᗘ౫Ꮡᛶ䛾䜻䞁䜽ཬ䜃␗ᖖ䝩䞊䝹ຠᯝ䛾䝠䝇䝔䝸䝅䝇䛛䜙ᙉ☢ᛶ㌿⛣ ᅗ㻌㻌 㻝㻌 Sr1-xPbxRuO3 (0 ≤ x ≤ 0.63)ᗘ䜢ぢ✚䜚䚸㌿⛣ ᗘ䛿䝞䝹䜽䜘䜚ప䛟䚸ᙉ☢ᛶ┦䛿䝞䝹䜽ከ⤖ᬗ䛸ྠ䛨䛟⣙ x = 0.6 䛾␗ᖖ䝩䞊䝹ゅ䛾 ᗘ౫Ꮡᛶ䚹㻌䛷ᾘኻ䛩䜛䛣䛸䛜ศ䛛䛳䛯䚹ᅗ 1 䛾␗ᖖ䝩䞊䝹ゅ䛾 ᗘ౫Ꮡᛶ䛛䜙䚸Pb 䝗䞊䝥䜢ᑡ㔞䝗䞊䝥䛧䛯ሙྜ䚸␗ᖖ䝩䞊䝹ຠᯝ䛿 SrRuO3 䛸ྠ䛨䛟➢ྕ཯㌿䛜㉳䛝䛶䛔䜛䛾䛻ᑐ䛧䚸Pb 䜢䛥䜙䛻䝗䞊䝥䛩䜛䛸➢ྕ཯㌿䛜ᾘኻ䛩䜛䛣䛸䛜ศ䛛䛳䛯䚹
[1] J.-G. Cheng et al., PNAS 110, 33 (2013).
[2] J.-G. Cheng et al., PRB 81, 134412 (2010).
8

P-17
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

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P-18୰㉥እບ㉳䛥䜜䛯䝇䝖䝷䜲䝥⣔㖡㓟໬≀㉸ఏᑟయ 㻸㼍㻝㻚㻢㻙㼤㻺㼐㻜㻚㻠㻿㼞㼤㻯㼡㻻㻠 䛾䝔䝷䝦䝹䝒ศග㻌
Terahertz spectroscopy of MIR-pumped stripe-ordered cuprate superconductor 㻌 㻌
La1.6-xNd0.4SrxCuO4
A ⌮Ꮫ⣔◊✲⛉䞉≀⌮Ꮫᑓᨷ䞉ᓥ㔝◊✲ᐊ, B ⏘⥲◊䞉㟁Ꮚගᢏ⾡◊✲㒊㛛, C ప⛉Ꮫ◊✲䝉䞁䝍䞊䞉◊✲㛤Ⓨ㒊㛛

AShimanoGroup, Department of Physics,

BAIST, CCryogenic

Research Centerす⏣ ᳃ᙪ A, ຾ぢ ᜏኴ A, Dongjoon SongB, Ọᓮ ὒ B, ᓥ㔝 ு A, C
Morihiko NishidaA, Kota KatsumiA, Dongjoon SongB, Hiroshi EisakiB, Ryo ShimanoA, C㖡㓟໬≀㉸ఏᑟయ䛷䛿㉸ఏᑟ┦䛾௚䛻䜒㟁Ⲵ䞉䝇䝢䞁ᐦᗘἼ䛺䛹ከᙬ䛺┦䛜Ⓨ⌧䛧䚸㉸ఏᑟ䛸䛾➇ྜ䞉ඹᏑ䜢⌮ゎ䛩䜛䛣䛸䛜㔜せ䛸䛺䛳䛶䛔䜛䚹䛺䛛䛷䜒䚸㟁Ⲵ䛸䝇䝢䞁䛜ᩚิ䛩䜛䝇䝖䝷䜲䝥⛛ᗎ䛿㉸ఏᑟ䛸➇ྜ䛩䜛䛣䛸䛜▱䜙䜜䛶䛚䜚䚸㟼ⓗ䛺ᅽຊ䜢ຍ䛘䛶䝇䝖䝷䜲䝥⛛ᗎ䜢◚ቯ䛩䜛䛸㉸ఏᑟ㌿⛣ᗘ䛜ୖ᪼䛩䜛䛣䛸䜒ほ䛥䜜䛶䛔䜛[1]䚹䜎䛯䚸㧗ᙉᗘ䛾୰㉥እග䜢↷ᑕ䛩䜛䛸䚸ගㄏ㉳㉸ఏᑟ䜢♧၀䛩䜛䝔䝷䝦䝹䝒ᖏ཯ᑕ⋡䝇䝨䜽䝖䝹䛜Ⓨ⌧䛩䜛䛣䛸䛜ሗ࿌䛥䜜䛶䛔䜛 [2]䚹୍᪉䛷䝇䝖䝷䜲䝥⛛ᗎ⮬య䛾ගບ㉳䛻䜘䜛ኚ໬䛻䛴䛔䛶䛿༑ศ䛻ㄪ䜉䜙䜜䛶䛚䜙䛪䚸䝇䝖䝷䜲䝥⛛ᗎ䛸㉸ఏᑟ䛾➇ྜ㛵ಀ䛾⌮ゎ䛻ྥ䛡䛶䛣䛾Ⅼ䜢᫂䜙䛛䛻䛩䜛ᚲせ䛜䛒䜛䚹䛭䛣䛷ᮏ◊✲䛷䛿䝇䝖䝷䜲䝥⛛ᗎ┦䛻䛚䛡䜛ග䝫䞁䝥䝔䝷䝦䝹䝒䝥䝻䞊䝤ᐃ䜢⾜䛳䛯䚹ᮏⓎ⾲䛷䛿䛭䛾ヲ⣽䜢ሗ࿌䛧䚸ගㄏ㉳≧ែ䚸㟁Ⲵ䞉䝇䝢䞁䝇䝖䝷䜲䝥䛾䝎䜲䝘䝭䜽䝇䛻䛴䛔䛶㆟ㄽ䛩䜛䚹[1] Z. Guguchia et al., Phys. Rev. Lett. 125, 097005 (2020).
[2] D. Fausti et al., Science 331, 189-191 (2011).
9

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P-20
㻲㼑㻛㻹㼓㻻㻛㼍㻌㻙㻳㼑㻛㻹㼓㻻㻛㻲㼑㻌䛛䜙䛺䜛⦪ᆺ䝇䝢䞁䝞䝹䝤⣲Ꮚ䛻䛚䛡䜛☢Ẽ᢬ᢠຠᯝ䛾ほ
Observation of magnetoresistance in Fe/MgO/D-Ge/MgO/ Fe vertical spin valve
devicesᕤᏛ⣔◊✲⛉㻌 㟁Ẽ⣔ᕤᏛᑓᨷ㻌 ⏣୰䞉኱▮◊✲ᐊణ㔝⏤᲍Ꮚ䚸㕥ᮌுኴ䚸⏣୰㞞᫂䚸኱▮ᚸ䝇䝢䞁䝖䝻䝙䜽䝇䛷䛿䚸ᚑ᮶䛾䜶䝺䜽䝖䝻䝙䜽䝇䛷⏝䛔䜙䜜䛶䛝䛯㟁Ꮚ䛾㟁Ⲵ䛰䛡䛷䛺䛟䚸㟁Ꮚ䛜ᣢ䛳䛶䛔䜛䛂䝇䝢䞁䛃䜢⏝䛔䜛䛣䛸䛻䜘䜚䚸䝇䝢䞁 MOSFET[1]䜢䛿

3.6 K

䛨䜑䛸䛩䜛᪂䛯䛺ᶵ⬟ᛶ䜢᭷䛧䛯䝕䝞䜲䝇䛾ᐇ⌧䜢┠ᣦ䛧䛶䛔䜛䚹⦪ᆺ䝇䝢䞁
MOSFET 䛿䚸ᶓᆺ䛾ᵓ㐀䛻ᑐ䛧䛶䝏䝱䝛䝹㛗䜢▷䛟䛩䜛䛣䛸䛜ᐜ᫆䛷䛒䜛䛣䛸䛛䜙䚸㧗䛔☢Ẽ᢬ᢠ(MR)ẚ䜢ᚓ䜙䜜䜛䛣䛸䛜♧䛥䜜䛯[2]䚹䛧䛛䛧䚸⦪ᆺ䝇䝢䞁
MOSFET 䜢ᵓᡂ䛩䜛䝦䝔䝻ᵓ㐀䜢ᐇ⌧䛩䜛ᮦᩱ⣔䛿㠀ᖖ䛻㝈䜙䜜䛶䛔䜛䚹ᮏ◊✲䛻䛚䛔䛶䛿䚸MgO (001)ୖ䛻〇⭷䛧䛯 Co (20 nm)/ Fe (20 nm)/ MgO (2 nm)/amorphous(a)-Ge (1 nm)/ MgO (2 nm)/ Fe (100 nm) ᵓ㐀䜢⏝䛔䛶⦪ᆺ䝇䝢䞁䝞䝹䝤⣲Ꮚ䜢స〇䛧䚸3.7 K 䛷 1.1%⛬ᗘ䛾 MR ẚ䜢ほ 䛩䜛䛣䛸䛻ᡂຌ䛧䛯䚹[1] S. Sugahara and M. Tanaka, Appl. Phys. Lett. 84, 2307 (2004).
[2] T. Kanaki et al., Appl. Phys. Lett. 107, 242401 (2015).
10

ZLWKDELDVYROWDJH9 P97KH
PDJQHWLF ILHOG + ZDV DSSOLHG LQ
SODQH DORQJ WKH >@ GLUHFWLRQZKLFK LV WKH HDV\ PDJQHWL]DWLRQ
D[LVRIWKH)HOD\HUVP-21䜹䜲䝷䝹཯ᙉ☢ᛶయ 㻯㼛㻺㼎㻟㻿㻢 䛻䛚䛡䜛ᕧ኱␗ᖖ䝩䞊䝹ຠᯝ
Large magneto-optical effect on chiral antiferromagnet CoNb3S6
ᕤᏛ⣔◊✲⛉≀⌮ᕤᏛᑓᨷ A䚸⌮◊ CEMSB, ᮾ኱ᮾி䜹䝺䝑䝆 C
ᯘᝆ኱ A䚸ᒸᮧ჆኱ A䚸䜹䞊䞁䞉䝚䜲䜵䞁 B䚸㛵┿୍㑻 A䚸༑಴ዲ⣖ A,B,C䚸㧗ᶫ㝧ኴ㑻 A
 ҡ৙ϙʖϩްՎͺࣙ൅ࣕԿ͗॑གྷ͵ༀׄΝՎͪͤϙʖϩްՎͲ͍Ζͳߡ͓ΔΗͱͪ͘ɽ͖ۛ͢͢೧ɼࣙ൅ࣕԿ
ΝΆͳΞʹ࣍ͪ͵͏‫͍Ͳܧ‬Ζൕ‫ࣕک‬੓ରͶ͕͏ͱ୉͘͵ҡ৙ϙʖϩްՎ͗൅‫͠ݡ‬Η஭໪ΝॄΌͱ͏Ζɽͨ͹େනྭͳ‫͓ݶ‬Ζ͹͗όϱαϨωΠ͵ηϒϱߑଆΝ࣍ͯൕ‫ࣕک‬੓ର 0Q6Q Ͳ͍Ζ>@ɽۛ೧Ͳͺ͠ΔͶɼηϒϱ͗ൕฑߨ͵ഓ஖ΝͳΖൕ‫ࣕک‬੓ର 5X2 Ͳ΍ɼ݃ধ͹ଲস੓Ͷ༟པ͢ͱҡ৙ϙʖϩްՎΝࣖͤ͞ͳ͗൅‫͠ݡ‬Ηͪ>@ɽ͖͢͢͞ΗΉͲɼ͞ΗΔ͹ൕ‫ࣕک‬੓ରͶ͕͜Ζҡ৙ϙʖϩްՎ͗ώϱχߑଆͶًҾͤΖ಼Ҿద͵‫ߑؽ‬ͶΓͮͱӀً͘͞͠Ηͱ͏Ζ΍͹͵͹͖௜ં‫ڂݜͪ͢ৄݗ‬ͺ͵͖ͮͪɽ ຌ‫Ͳڂݜ‬ͺɼ୉͘͵ҡ৙ϙʖϩްՎΝࣖͤηϒϱαϨωΠൕ‫ࣕک‬੓ର &R1E6 Ͷ͕͜ΖఁΦϋϩάʖ྘Ү͹ࣕ‫ްָޭـ‬Վ͹‫ڂݜ‬Νߨͮͪɽ&R1E6 ͺΩ΢ϧϩ͵݃ধߑଆΝ࣍ͬɼώϱχ‫ࢋܯ‬ͶΓΕϓΥϩϝϪϗϩ෉ۛͲ͹ %HUU\ ‫ི͗ۄ‬ҡ৙ϙʖϩްՎΝӀًͤ͘͞ͳ͠Ηͱ͏Ζ>@ɽࠕյಚΔΗͪ੼֐྘ҮͲ͹ࣕ‫ָޭـ‬Ωʖյ఺ηϘέφϩͺ . Ͳͺ PUDG Ν௔͓Ζ୉͘͠Ͷ͵ͮͪɽຌ‫Ͳڂݜ‬ͺ͠ΔͶϙʖϩఽ಍ౕηϘέφϩΝࢋड़͢ɼҡ৙ϙʖϩްՎͶ‫ر‬༫ͤΖޭָયҢΝ٠࿨ͪ͢ɽ
[1] S. Nakatsuji et al., Nature 527, 212 (2015). [2] Z. Feng et al., arXiv:2002.08712 (2021). [3] N. J. Ghimire et al., Nat.
Commun. 9, 3280 (2018).

P-22
䝬䝹䝏䝣䜵䝻䜲䝑䜽භ᪉ᬗ RFeO3 䛾ᐊ ཯ᙉㄏ㟁ᛶ䛻䛴䛔䛶
Room-Temperature Antiferroelectricity in Multiferroic Hexagonal Rare-earth Ferrites⌮Ꮫ⣔◊✲⛉໬Ꮫᑓᨷᅛయ໬Ꮫ◊✲ᐊJun Kasahara
Multiferroic materials, which exhibit both magnetic and electric orders, have been intensively explored due to their
extraordinary properties and a wide range of applications. Among various multiferroic materials, hexagonal rare-earth
manganites and ferrites (h-RMnO3 and h-RFeO3, respectively) are promising because of their high ferroelectric (FE) ordering
temperatures (> 800 K) and intimate coupling between magnetic and FE domains [1]. The
FE properties can be modulated by changing the ionic size of R. For example, when R isrelatively large, h-RMnO3 shows antiferroelectric (AFE) properties. However, to date, theAFE phase of h-RMn(Fe)O3 has been observed only in a narrow temperature range (60–160 K), which restricts magnetoelectric applications. In this study, I successfully
expanded the temperature range of AFE phase (10–300 K) by preparing h-DyFeO3 (hDFO) films with a low c/a ratio through epitaxial stabilization. In addition, I found weakferromagnetism and unusual magnetocapacitance (MC) behaviors such as an M-shaped
MC versus magnetic field (H) curve.
[1] H. Das et. al., Nat. Commun. 5, 2998 (2014)
11

Figure 1. P–E (a) curve of the hDFO film measured at 300 K and 5
kHz

P-23
13

C-NMR study of superconductivity in a doped spin liquid candidateᕤᏛ⣔◊✲⛉≀⌮ᕤᏛᑓᨷ䚸ᇸ⋢኱Ꮫ⌮Ꮫ㒊≀⌮Ꮫ⛉ Aⱝᯇᾈ኱䚸ୖ㔝⚈ᗈ䚸ᐑᕝ࿴ஓ䚸㇂ཱྀᘯ୕ A䚸㮵㔝⏣୍ྖᮏ◊✲䛾ᑐ㇟≀㉁䛷䛒䜛䃙-(ET)4Hg2.89Br8 (௨ୗ䃙-HgBr)䛿ᨃ 2 ḟඖ᭷ᶵ㉸ఏᑟయ䛷䛒䜛䚹䃙-HgBr 䛿⤯⦕ᒙ䛸ఏᑟᒙ䛾᱁Ꮚ୙ᩚྜ䛻䜘䜚ᐇຠⓗ䛺䜻䝱䝸䜰䝗䞊䝢䞁䜾䛜ᐇ⌧䛧䛶䛔䜛䚸᭷ᶵఏᑟయ䛷䛿౛እⓗ䛺⣔䛷䛒䜛䚹䝇䝢䞁⮬⏤ᗘ䛿ᒁᅾ䝇䝢䞁ⓗ䛷䛒䜚䚸䛭䛾ᗘ౫Ꮡᛶ䛿䚸⤯ᑐ㞽ᗘ䛷䜒☢Ẽ⛛ᗎ䜢♧䛥䛺䛔䛂䝇䝢䞁ᾮయ䛃䛸୍⮴䛧䛶䛔䜛[1]䚹୍᪉䚸㟁Ⲵ⮬⏤ᗘ䛿㔠ᒓⓗ䛷䛒䜚䚸ప䛷㉸ఏᑟ䛻䛺䜛 (Tc ~ 4 K)䚹௨ୖ䛛䜙䚸䃙-HgBr 䛿䛂䝇䝢䞁ᾮయ䛃䛻䜻䝱䝸䜰䝗䞊䝢䞁䜾䛥䜜䛯䚸䛣䜜䜎䛷౛䛾䛺䛔⣔䛷䛒䜚䚸䛭䛾≉␗䛺㟁Ꮚ䞉䝇䝢䞁≧ែ䚸㉸ఏᑟ䛾ᛶ㉁䛻኱䛝䛺㛵ᚰ䛜ᐤ䛫䜙䜜䜛䚹ᮏ◊✲䛷䛿ᚤどⓗ䛺䝥䝻䞊䝤䛷䛒䜛 NMR 䛻䜘䜚䚸㟁Ꮚ䞉䝇䝢䞁≧ែ䛾㟼ⓗ䞉ືⓗ䛺ᛶ㉁䜔㉸ఏᑟ䛾ヲ⣽䜢ᤊ䛘䜛䛣䛸䜢┠ⓗ䛸䛧䛯ᐇ㦂䜢⾜䛳䛯䚹䝇䝢䞁☢໬⋡䛸⦆࿴⋡䛾ᐃ䛻䜘䜚䚸䐟

䜼䝱䝑䝥䛻䝷䜲䞁䝜䞊䝗䜢᭷䛩䜛䝇䝢䞁䝅䞁䜾䝺䝑䝖㉸ఏᑟ䛷䛒䜛䛣䛸䚸䐠䝇䝢䞁䛾㟼ⓗ䞉ືⓗ䛺ᛶ㉁䛜䛸䜒䛻䝇䝢䞁ᾮయ䛾䜒䛾䛸ᑐᛂ䛩䜛䛣䛸䛾 2 Ⅼ䛜᫂䜙䛛䛸䛺䛳䛯䚹Ⓨ⾲䛷䛿ヲ⣽䜢㆟ㄽ䛩䜛ணᐃ䛷䛒䜛䚹

FIG.1. 䃙-HgBr 䛾䝇䝢䞁☢໬⋡䛸㟁Ẽ᢬ᢠ䛾 ᗘ౫Ꮡᛶ[1]䚹

[1] H. Oike, et al., Nat. Commun. 8, 756 (2017).

P-24
Pb(Bi,Sb)2(Te,Se)4 ࢺ࣏ࣟࢪ࢝ࣝ⤯⦕యࡢస〇࡜㟁Ẽ᢬ᢠ ᐃ
Fabrication and electrical resistivity measurements of Pb(Bi,Sb)2(Te,Se)4 topologicalinsulatorsᕤᏛ⣔◊✲⛉䝬䝔䝸䜰䝹ᕤᏛᑓᨷ㻌 M2
ᮡᮏ㻌 ᜤ୍䚸㻌 ᭹㒊㻌 ⿱ஓ䚸㻌 ᚨᮏ㻌 ᭷⣖䚸㻌 ᯞᕝ㻌 ᆂ୍φϛϫζΩϩઊԓର(TI)ͺɼಝҡ͵ుࢢηϒϱߑଆΝ࣍ͬɼන໚Ͷηϒϱย‫ͪ͢ۅ‬υΡϧέཽࢢ͗ଚࡑ͢ͱ͏
Ζɽ͖͢͢ಝच͵න໚ఽ಍͹‫ݗ‬ड़ͺ(Bi,Sb)2(Te,Se,S)3(BSTS‫ʹ͵)ܧ‬ɼTI͹͚͑ͬ͟Ҳ෨͹‫ܧ‬Ͷ‫ݸ‬ΔΗͱ͏Ζ[1]ɽTI͹ಝच͵න໚ఽ಍Ν‫ݗ‬ड़ͤΖͪΌͶɼώϩέΫϡϨΠΝఁ‫͢ݰ‬ώϩέઊԓ੓Ν޴৏ͦ͠Ζ͞ͳ͗॑གྷ͵՟ୌͳ
͵ͮͱ͏Ζɽຌ‫Ͳڂݜ‬ͺTI͹஦Ͳ΍BSTS‫ܧ‬Ͷ඘తͤΖώϩέώϱχάϡρϕΝ࣍ͯPb(Bi,Sb)2(Te,Se)4Νଲেͳ͢ɼ
Sb෾ི௒ઇͶΓΖώϩέΫϡϨΠཊ੏ͳSe෾ི௒ઇͶΓΖώϩέώϱχάϡρϕଁ୉͹2ͯ͹໚͖Δώϩέઊԓ੓Ν޴৏ͦ͠Ζ͞ͳΝ໪దͳͪ͢[2-4]ɽ(࢕ࠒΊSb෾ིxɼ࢕ࠒΊSe෾ིy)=(0.80, 0.10),(0.80, 0.20),(0.82, 0.30)ͳ͵ΖΓ͑‫ݬ‬ྋΝṟྖ͢ɼϔϨρζϜϱ๑Ͳ݃ধү੔ΝߨͮͪɽEPMAͶΓΖૌ੔඲Ճͳฆ຦XRD଎ఈͶΓΖ૮͹ಋఈΝߨ͏Pb(Bi1-x,Sbx)2(Te1-y,Sey)4ୱ૮྘Ү͖Δ2×1×0.2 mm3ఖౕ͹ࢾྋΝ઀Εड़͢ɼPPMSΝ༽͏ͱ2 ~ 300 KͲు‫ـ‬ఏ߇଎ఈɼ2 KͲϙʖϩ଎ఈΝߨͮͪɽͨ͹݃Վɼ͏ͥΗ͹࢕ࠒΊૌ੔͹݃ধ͖Δ΍ు‫ـ‬ఏ߇ི͹Իౕғଚ੓͗ઊԓରద͵৾Ζ෥͏ΝࣖͤࢾྋΝಚΖ͞ͳͶ੔ޯͪ͗͢ɼۜ଒ద͵৾Ζ෥͏Νࣖͤ΍͹ͳઊԓରద͵৾Ζ෥͏Νࣖͤ΍͹͗‫ڠ‬ଚ͢ͱ͏ͪɽΉͪɼn‫ܗ‬͹ࢾྋͳp‫ܗ‬͹ࢾྋ͗‫ڠ‬ଚ͢ͱ͕ΕɼώϩέΫϡϨΠືౕ͹୉͗͘͠ࢾྋ͟ͳ
Ͷҡ͵ͮͱ͏ͪɽͨ͞Ͳɼు‫ـ‬ఏ߇ི͹Իౕғଚ੓͗ઊԓରద৾Ζ෥͏ΝࣖͤϝϨηίʖϩࢾྋ͖Δ‫ॶۃ‬దͶώϩέઊԓ੓͗߶͏ࢾྋΝಚΖͪΌɼFIB-SEMΝ༽͏ͱ20×10×10 μm3ఖౕ͹Ϝ΢έϫηίʖϩࢾྋΝ઀Εड़͢ɼ2 ~300 KͲు‫ـ‬ఏ߇଎ఈΝߨͮͪɽ(x, y)=(0.82, 0.30)͹ϝϨηίʖϩࢾྋ͖Δ઀Εड़ͪ͢Ϝ΢έϫηίʖϩࢾྋ͖Δ
2 KͶ͕͜Ζώϩέఏ߇ི͗͏ͥΗ͹ϝϨηίʖϩࢾྋ͹2 KͶ͕͜Ζώϩέఏ߇ིΝ৏յΖ΍͹͗ಚΔΗͪɽ৆ࡋͺ൅නͲࣖͤɽ
[1] S. K. Kushwaha et al., Nat. Commun. 7, 11456 (2016). [2] Y. Hattori et al., Phys. Rev. Mater. 1, 074201 (2017).
[3] Y. Hattori et al., Sci. Rep. 10, 7957 (2020). [4] I. A. Shvets et al., Phys. Rev. B 96, 235124 (2017).
12

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㻞 ḟඖ 㻮㻯㻿㻙㻮㻱㻯 䜽䝻䝇䜸䞊䝞䞊䛻䛚䛡䜛☢᮰≧ែ㻌
Vortex matter in two dimensional BCS-BEC crossoverᕤᏛ⣔◊✲⛉䞉≀⌮ᕤᏛᑓᨷ䞉㔞Ꮚ┦䜶䝺䜽䝖䝻䝙䜽䝇◊✲䝉䞁䝍䞊
Max Heyl, ୰ᕝ⿱἞, ᯈᶫຬ㍤, ᒾబ⩏ᏹBCS(Bardeen-Cooper-Schrieffer)䛸 BEC(Bose-Einstein Condensation)䛿䚸ከ䝣䜵䝹䝭⢏Ꮚ⣔䛾㔞Ꮚจ⦰≧ែ䛾 2 䛴䛾ᴟ㝈䛷䛒䜛䚹䛣䜜䜙䛾 2 䛴䛾ᴟ㝈䛿┦㌿⛣䛷䛿䛺䛟㐃⥆ⓗ䛻䛴䛺䛜䜛䛸⪃䛘䜙䜜䛶䛚䜚䚸ᐇ㦂ᐊ⣔䛷䛿෭༷ཎᏊ⣔䛜 BEC
䛛䜙䚸㉸ఏᑟ䛜 BCS 䛛䜙䜽䝻䝇䜸䞊䝞䞊䛻䜰䝥䝻䞊䝏䛩䜛᪉ἲ䛜ྲྀ䜙䜜䛶䛔䜛䚹㉸ఏᑟ⣔䛷䛿䚸᭱㏆ FeSe [1]䜔䝒䜲䝇䝖䜾䝷䝣䜵䞁 [2]䛺䛹䛜Ⓨぢ䛥䜜䚸䛣䛾⌧㇟䛾⌮ゎ䛜ᛴ⃭䛻㐍䜏ጞ䜑䛶䛔䜛䜘䛖䛻ᛮ䜟䜜䜛䚹㏆ᖺᡃ䚻䛿䚸Li 䜢䜲䞁䝍䜹䝺䞊䝅䝵䞁䛧䛯ᒙ≧❅໬≀ LixZrNCl 䛻ᑐ䛧䛶䚸Li 㔞䜢 30%䛛䜙 0.4%䜎䛷 2 ᱆㏆䛟ኚ໬䛥䛫䜛䛣䛸䛻ᡂຌ䛧䚸ᮍ㋃䛾ప䜻䝱䝸䜰㡿ᇦ䜢ᐇ⌧䛩䜛䛣䛸䛻ᡂຌ䛧䚸䝖䞁䝛䝹ศග䛸ྜ䜟䛫䛶ᨃ䜼䝱䝑䝥䜢ྵ䜑䛯┦ᅗ䜢Ỵᐃ䛩䜛䛸䛸䜒䛻䚸ᮏ⣔䛜 2 ḟඖ BCS-BEC 䜽䝻䝇䜸䞊䝞䞊䜢♧䛩⣔䛷䛒䜛䛣䛸䜢᫂䜙䛛䛻䛧䛯[3]䚹ZrNC䡈䛿භ᪉ᬗ⣔䛾༢⣧䛺༙ᑟయ䛷䛭䜜䛻䜻䝱䝸䜰ᩘ䜢䝗䞊䝥䛧䛶ᚓ䜙䜜䜛ᑡᩘ䜻䝱䝸䜰㉸ఏᑟయ䛷䚸BCS-BEC 䜽䝻䝇䜸䞊䝞䞊⌧㇟䛾䝰䝕䝹≀㉁䛻䛺䜚䛖䜛⣔䛷䛒䜛䚹ᮏ◊✲䛷䛿䚸䜽䝻䝇䜸䞊䝞䞊㡿ᇦ䛷䛾☢᮰䛾᣺䜛⯙䛔䜢ㄪ䜉䛯䛾䛷ሗ࿌䛩䜛䚹[1] S. Kasahara et al., Proc. Natl. Acad. Sci. U. S. A. 111, 16309 (2014).
[2] Y. Cao et al., Nature 556, 43 (2018).
[3] Y. Nakagawa et al., arXiv:2012.05707.

P-28
Epitaxial strain dependence of the magnetic anisotropy of n-type ferromagnetic
semiconductor (In,Fe)Sb studied by ferromagnetic resonance measurements
1Dept. of EEIS, Univ. of Tokyo, 2IEI, Univ. of Tokyo, 3PRESTO, JST, 4CSRN, Univ. of Tokyo

Akhil Pillai1, Shobhit Goel1, Le Duc Anh1,2,3, and Masaaki Tanaka1,4This work presents the first observation of ferromagnetic resonance (FMR)
signal in the n-type ferromagnetic semiconductor (In1-x,Fex)Sb (x =15%) [1] atroom temperature and its dependence of magnetic anisotropy (MA) on epitaxial
strain by FMR measurements. Epitaxial strain ranging from compressive (AlSb
buffer) to tensile strain (InSb buffer) can be induced in (In,Fe)Sb by growing
on different buffers. This study shows the change in sign of magneto-crystalline
component(Ki) of MA from positive (perpendicular magnetization) to negative(in-plane magnetization) on changing the strain from compressive to tensile. In
all the samples, shape anisotropy (Ksh) is negative in sign and larger than Ki.
Thus, the effective magnetic anisotropy (Keff =Ksh +Ki) is always negative, and FIG. 1 (a) Sample structure. Inset shows the definition
we observe in-plane magnetic anisotropy (IMA) for all the samples. The of θH and magnetic field H used in measurements. (b)behaviour observed is similar to that shown by (Ga,Fe)Sb [2].
[1]
[2]

N.T. Tu et. al Appl. Phys. Express 11, 063005 (2018)
Goel, et al. Phys. Rev. B 99, 014431 (2019)14

FMR signals for (In,Fe)Sb/AlSb (Sample A) (c) FMR
signals for (In,Fe)Sb/InSb (Sample B). (d) FMR
resonant field ߤ௢ HR vs. H direction θH in both
samples. Dots and curves denote experimental data andfitting results, respectively.

P-29㻔㻼㼎㻝㻙㼤㻿㼚㼤㻕㻝㻙㼥㻵㼚㼥㼀㼑 ⷧ⭷䛻䛚䛡䜛䝋䝣䝖䝣䜷䝜䞁䛾䝔䝷䝦䝹䝒ศග㻌
Terahertz spectroscopy of soft phonon in (Pb1-xSnx)1-yInyTe thin filmᕤᏛ⣔◊✲⛉㻌 ≀⌮ᕤᏛᑓᨷ㻌 㧗ᶫ(㝧)◊✲ᐊ༙⏣ග, ᒸᮧ჆኱, ྜྷぢ㱟ኴ㑻, ሯᓮᩔ, 㧗ᶫᆂ, ᕝᓮ㞞ྖ, ༑಴ዲ⣖, 㧗ᶫ㝧ኴ㑻䢶䢲䢲䢲≀㉁䛾ග㥑ື䛾᭱䜒㔜せ䛺┠ᶆ䛾 1 䛴䛸䛧䛶ᙉㄏ㟁┦䛾㉸㧗㏿ไᚚ䛜䛒䛢䜙䜜ᙉບ㉳ຠᯝ[1,2]䛻䛴䛔䛶㠀ᖖ䛻┒䜣䛻◊✲䛥䜜䛶䛝䛯䚹䛧䛛䛧䚸┦㌿⛣䛸㛵㐃䛧䛯䝋Re[H Z @䜛䚹౛䛘䜀䚸㔞Ꮚᖖㄏ㟁య䛾 SrTiO3 䛾䝋䝣䝖䝰䞊䝗ບ㉳䛿䛭䛾௦⾲ⓗ䛺ೃ⿵䛷䛒䜚䚸䢵䢲䢲䢲䝣䝖䝣䜷䝜䞁䛾㠀⥺ᙧ䝎䜲䝘䝭䜽䝇䛻䛴䛔䛶䛿䚸ᮍゎ᫂䛺Ⅼ䜒ከ䛟䚸ೃ⿵䛸䛺䜛≀㉁⩌

10 K

630 kV/cm
500 kV/cm
420 kV/cm
310 kV/cm
190 kV/cm
linear region

䢴䢲䢲䢲

䢳䢲䢲䢲
䢲
䢯䢳䢲䢲䢲
䢲䢰䢲

䜒㝈䜙䜜䛶䛔䛯䚹ᮏ◊✲䛷䛿ᙉㄏ㟁䛛䛴䝖䝫䝻䝆䜹䝹⤖ᬗ⤯⦕య䛷䛒䜛 SnTe 䛸䚸⮬

䢲䢰䢶

䢲䢰䢺

䢳䢰䢴

䢳䢰䢸

Frequency (THz)᫂䛺ᖖㄏ㟁య䛷䛒䜛 PbTe 䛾ΰᬗ⣔䛻ὀ┠䛧䛯䚹䛣䛾⣔䛷䛿ᙉㄏ㟁ᛶ䜔㟁Ẽఏᑟᛶᅗ (Pb0.8Sn0.2)0.9In0.1Te ⷧ⭷䛾ㄏ㟁⋡䝇䝨䜽䝖䝹
ᮏ◊✲䛷䛿⤯⦕యⓗ䛺(Pb0.8Sn0.2)0.9In0.1Te ⷧ⭷䛻䛚䛔䛶䝔䝷䝦䝹䝒ㄏ㟁⋡䝇䝨䜽䝖䝹䛾㟁ሙ౫Ꮡᛶ䜢 ᐃ䛧䛯䚹䝟䝹䜢ไᚚྍ⬟䛷䛒䜚䚸䝋䝣䝖䝣䜷䝜䞁䛾䝎䜲䝘䝭䜽䝇䛻䜰䝥䝻䞊䝏䛩䜛᭱㐺䛺⣔䛸䛔䛘䜛䚹䝇㠃ഴᩳἲ䜢⏝䛔᭱኱㟁ሙ 630 kV/cm 䛷 ᐃ䜢⾜䛳䛯䚹㟁ሙᙉᗘ䛾ቑ኱䛻క䛳䛶䚸䝋䝣䝖䝣䜷䝜䞁䛾ඹ㬆࿘Ἴᩘ䛜 0.4
THz 䛛䜙 0.8 THz 䛻䝝䞊䝗໬䛩䜛㠀⥺ᙧ䛺ᛂ⟅䛾ほ 䛻ᡂຌ䛧䛯(ᅗ 1)䚹䜎䛯䚸䛣䛾㠀⥺ᙧᛂ⟅䜢ㄪ࿴᣺ືᏊ䝰䝕䝹䛻㠀ㄪ࿴䝫䝔䞁䝅䝱䝹䜢ຍ䛘䛯䝰䝕䝹[2]䜢⏝䛔䜛䛣䛸䛷ཎᏊኚ఩䚸䝣䜷䝜䞁䝫䝔䞁䝅䝱䝹䜢ぢ✚䜒䜛䛣䛸䛻ᡂຌ䛧䛯䚹[1] X. Li et al., Science 364, 1079 (2019).
[2] I. Katayama et al., Phys. Rev. Lett. 108, 097401 (2012).

P-30
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"WJA&Tj"oZxVPtiFR" +)>

R

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RHy[ krot (THz) FRN

1.05 THz(560 K)

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190 290 390 490 590
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P-31
⥺≧䛻㐃䛺䜛䝕䜱䝷䝑䜽Ⅼ䜢᭷䛩䜛᭷ᶵ༙㔠ᒓ䛾 㻺㻹㻾 ◊✲㻌
NMR studies on organic semimetals with Dirac nodal lineᮾி኱Ꮫ኱Ꮫ㝔ᕤᏛ⣔◊✲⛉䞉≀⌮ᕤᏛᑓᨷ䞉㮵㔝⏣◊, A ᪥ᮏ኱Ꮫᩥ⌮Ꮫ㒊, B ⏘⥲◊㛵᰿Ꮥᙪ, 㡲Ἴᆂྐ, ᐑᕝ࿴ஓ, ⛅ඖ೺ử A, ࿘᙭ A, ▼ᶫ❶ྖ B, ᑠᯘ᫛Ꮚ A, 㮵㔝⏣୍ྖ⤖ᬗ୰䛾≉Ṧ䛺䝫䝔䞁䝅䝱䝹ᵓ㐀䛻䜘䜚䚸᭷ຠ㉁㔞䛜䝊䝻䛸䛺䜚┦ᑐㄽⓗᛶ㉁䜢♧䛩㟁Ꮚ⣔䜢䝊䝻㉁㔞 Dirac 㟁Ꮚ⣔䛸䛔䛖䚹䛣䛾㟁Ꮚ⣔䛿䝁䞊䞁ᆺ䛾䜶䝛䝹䜼䞊ศᩓ䜢♧䛧䚸䝁䞊䞁䛾㡬Ⅼ(Dirac Ⅼ)䜎䜟䜚䛷䛿䚸㏻ᖖ䛾㔠ᒓ䞉༙ᑟయ䛸䛔䛳䛯ᯟ⤌䜏䛷䛿ᤊ䛘䜙䜜䛺䛔䝊䝻㉁㔞䛾㟁Ꮚ䛾≉␗䛺≀ᛶ䜢♧䛩䚹Dirac Ⅼ䛜Ἴᩘ✵㛫䛷⥺≧䛻㐃䛺䛳䛶䛔䜛䛾䛜 Diracnodal line 䛷䛒䜛䚹Dirac Ⅼ䛜㐃⥆ⓗ䛻ศᕸ䛩䜛䛣䛸䛷䛥䜙䛻᪂つ䛺≀⌮⌧㇟䛜ᮇᚅ䛥䜜䛶䛔䜛䛜䚸䛭䛾ೃ⿵䛸䛺䜛䝰䝕䝹≀㉁䛿ᮍ䛰ከ䛟䛿ぢ䛴䛛䛳䛶䛔䛺䛔䚹䛭䜣䛺୰䚸᭷ᶵ༙㔠ᒓ[M(dmdt)2] (M=Ni, Pt) 䛜 Dirac nodal line 䜢᭷䛩䜛䛣䛸䛜⌮ㄽⓗ䛻ண᝿䛥䜜䛶䛔䜛 [1]䚹ᮏ◊✲䛷䛿䚸[M(dmdt)2]୰䛾 Dirac nodal line 䛾Ꮡᅾ䜢ᐇ㦂ⓗ䛻᳨ド䛧䚸䛥䜙䛻䚸䛭䛣䛻⏕䜎䜜䜛᪂䛧䛔≀⌮䜢᥈ồ䛧䛶䛔䜛䚹13C ⨨᥮యከ⤖ᬗヨᩱ䛻㟼☢ሙ䜢༳ຍ䛧䛶 NMR ᐇ㦂䜢⾜䛔䚸䝇䝨䜽䝖䝹䝅䝣䝖䛸᰾䝇䝢䞁-᱁Ꮚ⦆࿴⋡ͳȀܶଵ䠄䛭䜜䛮䜜㟼ⓗ/ືⓗ☢໬⋡䛻ᑐᛂ䛩䜛䠅䜢 ᐃ䛧䛯䚹୧≀㉁䛾䝅䝣䝖䛸ͳȀሺܶଵ ܶሻ䛿䚸㧗
Dirac 㟁Ꮚ⣔ⓗ䛺᣺䜛⯙䛔䜢䚸ప 䛷䛿㔠ᒓⓗ䛺᣺䜛⯙䛔䜢♧䛧䚸⌮ㄽⓗ䛻ண䛸▩┪䛧䛺䛔䚹䛸䛣䜝䛜䚸ͳȀሺܶଵ ܶሻ䛿୰㛫

䛷䛿 2 ḟඖ䛥䜜䛯 Dirac nodal line ⣔䛾䝞䞁䝗ᵓ㐀ᗘ(30 K)䛷ᴟ኱䜢ྲྀ䛳䛯䚹䛣䜜䛿㟁Ꮚ䝇䝢䞁䛾ᦂ䜙䛞䛾≉␗䛺ቑ኱䜢♧၀䛩䜛䚹⌧ᅾ䚸䛣䛾␗ᖖ䛜㟼☢ሙୗ䛷 Dirac nodal line 䛜♧䛩≉␗䛺 Landau ‽఩ᵓ㐀䛻㉳ᅉ䛩䜛ྍ⬟ᛶ䜢᳨ウ䛧䛶䛔䜛䚹[1] B. Zhou et al., Chem. Commun., 55, 3327(2019)

P-32
㻯㼛㻞䠇⨨᥮ᕼᅵ㢮㕲䜺䞊䝛䝑䝖ⷧ⭷䛻䛚䛡䜛᱁ᏊḞ㝗ᑟධ䛻䜘䜛䝇䝢䞁෾⤖ ᗘ䛾㧗 ໬㻌High spin freezing temperature in Co2+ substituted rare-earth iron garnet thin films
due to introduction of lattice defectsᕤᏛ⣔◊✲⛉ 㟁Ẽ⣔ᕤᏛᑓᨷ ⏣⏿䞉ᯇ஭䞉㛵◊✲ᐊ㻌 ᑎᑿ೺⿱䚸ᒣཎᘯ㟹䚸⏣⏿ோ䝇䝢䞁䜾䝷䝇䛿䝇䝢䞁䛾䝷䞁䝎䝮䝛䝇䛸䝣䝷䝇䝖䝺䞊䝅䝵䞁䛾☢Ẽ┦㛵䛻䜘䜚䚸ప 䛷䝇䝢䞁෾⤖≧ែ䜢䛸䜛≀㉁䛷䛒䜛䚹䝇䝢䞁෾⤖≧ែ䛷䛿䝯䝰䝸ຠᯝ䜔䜶䞊䝆䞁䜾⌧㇟䛸࿧䜀䜜䜛≉ᚩⓗ䛺☢Ẽグ᠈䜢♧䛧䚸⯆࿡῝䛔ᛶ㉁䛸䛧䛶ὀ┠䛥䜜䛶䛔䜛䚹䛧䛛䛧䛺䛜䜙୍⯡ⓗ䛺䝇䝢䞁䜾䝷䝇䛻䛚䛔䛶䝇䝢䞁෾⤖ ᗘ Tg 䛿ᩘ 10 K ⛬ᗘ䛷ᛂ⏝䛻䛒䛯䛳䛶䛿ᐊ ௨ୖ䛾㧗 ໬䛜ᮃ䜎䜜䜛䚹ᮏ◊✲䛷䛿ඖ⣲⨨᥮䛻ຍ䛘䛶᱁Ꮚṍ䜏䜢ᑟධ䛩䜛䛣䛸䛻䜘䜚䚸Tg 䛾㧗 ໬䜢┠ᣦ䛧䛯䚹
ヨᩱ䛿䝇䝢䞁Ἴᛂ⏝䛜ᮇᚅ䛥䜜䛶䛔䜛ᕼᅵ㢮㕲䜺䞊䝛䝑䝖䜢ᑐ㇟䛸䛧䚸␗᪉ᛶ Co2+䛸㠀☢ᛶ Ge4+䜢ඖ⣲⨨᥮䛧䛯 Lu3Fe4.8Co0.1Ge0.1O12 (LFCG)ⷧ⭷䜢 Y3Al5O12(001)ᇶᯈୖ
䛻ሁ✚䛧䛯䚹ᇶᯈ䛸ⷧ⭷䛾᱁Ꮚ䝭䝇䝬䝑䝏䛿 2.1%䛷⮫⏺⭷ཌ tc 䛿 12 nm 䛜ィ⟬䛥䜜䜛䚹tc ௨ୗ䛾⭷ཌ䛷䛿 LFCG 䛿ṇ᪉ᬗ䛻ṍ䜏䚸䜲䜸䞁㛫㊥㞳䛾᥋㏆䜔ᑐ⛠ᛶ䛾పୗ䛻䜘䛳ᅗ 1. LFCG ⷧ⭷䛻䛚䛡䜛䝇䝢䞁෾⤖ ᗘ䛶⦰㏥䛜ゎ䛡䜛䛣䛸䛷஺᥮┦஫స⏝䛾ኚ໬䜢௓䛧䛶 Tg 䛾㧗 ໬䛜ᮇᚅ䛥䜜䜛䠄Tg ~䛾⭷ཌ౫Ꮡᛶ
J(D/J)1/4, J 䛿஺᥮┦஫స⏝䚸D 䛿☢Ẽ␗᪉ᛶ䠅[1]䚹୍᪉䚸tc ௨ୖ䛾⭷ཌ䛷䛿 LFCG 䛿❧᪉ᬗ䛻᱁Ꮚ⦆࿴䛧䚸᱁ᏊḞ㝗䛻☢Ẽ䝗䝯䜲䞁䛜䝢䝙䞁䜾䛥䜜䜛䛣䛸䛻䜘䜚ಖ☢ሙ䛾ቑຍ䛸 Tg 䛾㧗 ໬䛜ᮇᚅ䛥䜜䜛
䠄Hc~ξ1/2, ξ 䛿㌿఩ᐦᗘ䠅䚹☢Ẽ≉ᛶ䛿ప 䝉䞁䝍䞊䛾ඹ㏻ᶵჾ䛷䛒䜛 MPMS 䛻䜘䛳䛶ㄪ䜉䚸஺ὶ☢໬⋡ ᗘ౫Ꮡᛶ䛾䜹䝇䝥䛛䜙ᚓ䛯 Tg 䛾⭷ཌ౫Ꮡᛶ䜢ᅗ 1 䛻♧䛩䚹ྛヨᩱ䛾䝇䝢䞁෾⤖ ᗘ䛿䚸⭷ཌ 6 nm 䛾ṇ᪉ᬗᆒ୍ṍ㡿ᇦヨᩱ䛷䛿
320-350 K䚸⭷ཌ 35 nm 䛾⭷ཌ᪉ྥഴᩳṍ㡿ᇦヨᩱ䛷䛿 350-360 K䚸⭷ཌ 50 nm 䛾᏶඲᱁Ꮚ⦆࿴㡿ᇦヨᩱ䛷䛿 370380 K 䜢♧䛧䛯䚹䛣䜜䜘䜚䚸⤖ᬗ⭷ཌ䜢ኚ໬䛥䛫䜛䛣䛸䛷⤖ᬗᵓ㐀䜢ไᚚ䛧䚸ṇ᪉ᬗ䛛䜙᱁Ꮚ⦆࿴䛥䛫䜛䛣䛸䛷䝇䝢䞁෾⤖ᗘᖜ䛿ῶᑡ䛩䜛୍᪉䚸䝇䝢䞁෾⤖ ᗘ䜢ୖ䛢䜙䜜䜛䛣䛸䛜᫂䜙䛛䛸䛺䛳䛯䚹[1] B W Morris et al., J. Phys. C: Solid State Phys. 19 1157 (1986)

16

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P-36
Design of Thiocyanido-bridged FeII-HgII Frameworks Revealing Chirality, Spincrossover and Photomagnetism
Ohkoshi Laboratory, Department of Chemistry, School of Science
Guanping LI
Numerous aspects of spin-crossover (SCO) materials such as syntheses, structures, andphysicochemical properties have been vigorously researched in last decades.[1] In thiscontent, the goal of my work is to design and characterize the high dimensional thiocyanidobridged SCO compounds 1-3 based on iron(II) ions with [Hg(SCN)4]2- anions and 2-, 3-, and4-acetylpyridines(2-, 3-, and 4-acpy) respectively. Crystals of compound 1 ({[Fe(2acpy)][Hg(SCN)4]}n) have interesting chiral character due to formation of two mirror-image

Fig 1. Structures of 1 - 3

3D thiocyanido-bridged networks. Crystals of {[Fe(3-acpy)2][Hg(SCN)4]}n (2) consist of 2D folded-layers. For compound 3{[Fe(4-acpy)2][Hg(SCN)4]}n, it has 3D networks and temperature-dependent structural parameters owning to changes of spinstates of FeII irons. Crystal 1 and 2 remain high-spin states when decreasing the temperature, while crystal 3 reveals partial
SCO effect with T1/2 = 103 K. The Light-Induced Excited Spin-State Trapping (LIESST) effect can be observed for crystal 3
with 473, 532, 658 and 1064 nm lights, which can be further testified by temperature-dependent UV-Vis and IR spectra.
[1] M. Carmen Munoz et al., Coordination Chemistry Reviews. 255, 2068-2093(2011)

18

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19

P-39
Growth and characterization of ferromagnetic Fe-doped InAs quantum dots with highCurie temperature
Affiliations: University of Tokyo, Graduate School of Engineering, EEIS, Tanaka-Ohya Lab
Authors:㻌㻌 Karumuri Sriharsha, Le Duc Anh, and Masaaki Tanaka
Ferromagnetic semiconductor quantum dots (QDs) show lowdimensional confinement of carriers that allows for highly effective gatevoltage control of their magnetic properties and Curie temperature (TC) [1].
For applications such as single electron spin transistors (SESTs),
ferromagnetic QDs with high TC and good compatibility withsemiconductor platforms are essential. In this research, we were successful
in the growth of ferromagnetic QDs by doping Fe into InAs QDs. The)LJ+\VWHUHVLVRI)HGRSHG,Q$V4'V transmission electron microscopy (TEM) image shows a clear Zinc Blende crystal structure and superconducting quantum
interference device (SQUID) magnetometry measurements (Fig. 1) show that the TC of these QDs is more than 300K. This
result also provides a new way to increase the TC of (In,Fe)As whose maximum TC in bulk is far below room temperature.
[1] F. Xiu, Y. Wong, J. Kim, A. Hong, J. Tang, A. P. Jacob, J. Zou and K. L. Wang, Nat. Materials 9, 337 (2010).
[2] P. N. Hai, S. Sugahara and M. Tanaka, Jpn. J. Appl. Phys. 46, 6579 (2007).

P-40
཯㌿ᑐ⛠䝇䜻䝹䝭䜸䞁≀㉁ 㻳㼐㻞㻼㼐㻿㼕㻟 䛻䛚䛡䜛䝖䝫䝻䝆䜹䝹☢ẼගᏛຠᯝ㻌
Topological magneto-optical effect in the centrosymmetric skyrmion magnet Gd2PdSi3ᕤᏛ⣔◊✲⛉䞉≀⌮ᕤᏛᑓᨷ䞉㧗ᶫ(㝧)◊✲ᐊຍ⸨႐኱䚸ᒸᮧ჆኱䚸Max Hirschberger䚸༑಴ዲ⣖䚸㧗ᶫ㝧ኴ㑻䝘䝜䝇䜿䞊䝹䛾 ᕳ䛝≧䛾☢Ẽᵓ㐀䛷䛒䜛䝇䜻䝹䝭䜸䞁䛿䚸䝇䝢䞁䝖䝻䝙䜽䝇䛾᝟ሗ፹య䛸䛧䛶ὀ┠䛥䜜䚸䛭䛾≀ᛶᛂ⟅䛻䛴䛔䛶◊✲䛜㐍䜑䜙䜜䛶䛔䜛[1]䚹䝇䜻䝹䝭䜸䞁䛿≀㉁୰䛻䛚䛔䛶ᙉ䛔᭷ຠ☢ሙ䜢๰Ⓨ䛧䚸ఏᑟ≉ᛶ䛻኱䛝䛺ᙳ㡪䜢୚䛘䜛䚹䛣䛾๰Ⓨ☢ሙ䛻䜘䜛ᙳ㡪䛿䝩䞊䝹ຠᯝ䛸䝛䝹䞁䝇䝖ຠᯝ䛻⌧䜜䚸䛭䜜䛮䜜䝖䝫䝻䝆䜹䝹䝩䞊䝹ຠᯝ䞉䝖䝫䝻䝆䜹䝹䝛䝹䞁䝇䝖ຠᯝ䛸䛧䛶▱䜙䜜䛶䛔䜛䚹䛧䛛䛧䚸๰Ⓨ☢ሙ䛾⌧䜜䜛≀ᛶ⌧㇟䛿ୖ䛾䠎䛴䛾䜏䛻䛸䛹䜎䛳䛶䛔䜛䚹㻌 ᮏ◊✲䛷䛿䚸☢Ẽ䛸⤖䜃䛴䛔䛯ගᏛᛂ⟅䛸䛧䛶☢ẼගᏛ䜹䞊ຠᯝ(௨ୗ䜹䞊ຠᯝ)䛻╔┠䛧◊✲䜢⾜䛳䛯䚹ᕧ኱䛺䝖䝫䝻䝆䜹䝹䝩䞊䝹䞉䝛䝹䞁䝇䝖ຠᯝ䜢Ⓨ⌧䛩䜛཯㌿ᑐ⛠䝇䜻䝹䝭䜸䞁≀㉁ Gd2PdSi3 䜢ᑐ㇟䛻ᗈᖏᇦ䛷䛾䜹䞊ຠᯝ䜢ᐃ䛧䛯

ᅗ 19 K 䛻䛚䛡䜛䜹䞊ᴃ෇⋡䛾☢ሙ౫Ꮡᛶ[2,3]䚹䛭䛾⤖ᯝ䚸㉥እ㡿ᇦ䛻䛚䛔䛶䝇䜻䝹䝭䜸䞁䛻⏤᮶䛧䛯䝖䝫䝻䝆䜹䝹䜹䞊ຠᯝ䛜ほ 䛥䜜䛯(ᅗ 1)䚹ᮏⓎ⾲䛷䛿䜹䞊ຠᯝ䛾☢ሙ౫Ꮡᛶཬ䜃䜶䝛䝹䜼䞊౫Ꮡᛶ䛾≉␗䛺䜅䜛䜎䛔䛻䛴䛔䛶㆟ㄽ䛩䜛䚹[1] Y. Tokura and N. Kanazawa, Chem. Rev. 10.1021/acs.chemrev.0c00297 (2020).
[2] T. Kurumaji et al., Science 365, 914 (2019). [3] M. Hirschberger et al., Phys. Rev. Lett. 125, 076602 (2020).
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P-41
䝣䝸䞊䝇䝍䞁䝕䜱䞁䜾 㻞 ᒙ䜾䝷䝣䜵䞁䛻䛚䛡䜛 㻯㼍 䜲䞁䝍䞊䜹䝺䞊䝖ㄏ㉳㉸ఏᑟCa-intercalation-induced superconductivity in freestanding bilayer grapheneᮾி኱Ꮫ⌮Ꮫ⣔◊✲⛉≀⌮Ꮫᑓᨷ㛗㇂ᕝ◊✲ᐊ 1,ᮾிᕤᴗ኱Ꮫ⌮Ꮫ㝔≀⌮Ꮫ⣔ᖹཎ◊✲ᐊ 2, ᮾி኱Ꮫ≀ᛶ◊✲ᡤᑠ᳃◊✲ᐊ 3㐲ᒣᬕᏊ 1, ⛅ᒣ஢ኴ 1, బ⸨▐ு 1, 㐲⸨⏤኱ 1, ಖཎ㯇 1, ᇼ஭೺ኴ㑻 2,ᶫ∎⍞ⵇ 2, ୍䝜಴⪷ 2, ᖹཎᚭ 2, 㣤┒ᣅႹ 3, ᑠ᳃ᩥኵ 3, 㛗㇂ᕝಟྖ 1
Ⅳ⣲ཎᏊࡀࣁࢽ࣒࢝ᵓ㐀ࢆᣢࡗࡓ 2 ḟඖ≀㉁࡛࠶ࡿࢢࣛࣇ࢙ࣥࡀ 2 ᒙ㔜࡞ࡿሙྜࠊࡑࡢᒙ㛫࡟ཎᏊࡸศᏊࡀᤄධ㸦࢖ࣥࢱ࣮࣮࢝ࣞࢺ㸧ࡉࢀࡿ࡜≀ᛶࡀ๻ⓗ࡟ኚ໬ࡋࠊCa ࡢሙྜࡣ㉸ఏᑟࡀⓎ⌧ࡍࡿ[1]ࠋࡑࡢ㉳※ࡣ࢖ࣥࢱ࣮ࣞ࢖࣮ࣖࣂࣥࢻ࡟ࡼࡿ
࡜ࡉࢀ࡚࠸ࡓࡀ[2]ࠊ௚ࡢ㟁Ꮚᵓ㐀⏤᮶ࡢྍ⬟ᛶࢆ᤼㝖࡛ࡁ࡚࠸࡞࠿ࡗࡓࠋࡉࡽ࡟ࠊ
ᚑ᮶᝿ᐃࡉࢀ࡚࠸ࡓ✚ᒙᵓ㐀ࣔࢹࣝ࡜ᐇ㝿ࡢᵓ㐀ࡀ␗࡞ࡿࡇ࡜ࡀሗ࿌ࡉࢀ[3,4]ࠊṇ☜࡞✚ᒙᵓ㐀ࣔࢹࣝ࡟ᇶ࡙࠸ࡓ㉸ఏᑟⓎ⌧ᶵᵓࡢゎ᫂ࡀồࡵࡽࢀ࡚࠸ࡿࠋᮏ◊✲࡛ࡣࠊ㉸ఏᑟࢢࣛࣇ࢙ࣥᒙ㛫໬ྜ≀࡟࠾࠸࡚ࠊᵝࠎ࡞స〇᮲௳ୗ࡛⾲㠃ᵓ㐀࣭㟁Ꮚ≧ែ࣭㟁Ẽఏᑟ≉ᛶࢆ⣔⤫ⓗ࡟ㄪᰝࡋࠊṇ☜࡞✚ᒙᵓ㐀ࡢ≉ᐃ࡜ࠊᵓ㐀࡜㉸ఏᑟࡢ㛵㐃࡟ࡘ࠸࡚᫂ࡽ࠿࡟ࡋࡓࠋⓎ⾲࡛ࡣⓎ⌧ᶵᵓ࡟㛵ࡍࡿ⪃ᐹ࡞࡝ࡶྵࡵ㆟ㄽࡍࡿࠋᅗ 1, Ca ࢖ࣥࢱ࣮࣮࢝ࣞ
ࢺࢢࣛࣇ࢙ࣥࡢ㟁Ꮚᅇᢡീࠋ▮༳ࡣ࢖ࣥࢱ࣮࢝
࣮ࣞࢺ࡟ࡼࡿ࿘ᮇᵓ㐀⏤᮶ࡢᅇᢡࢫ࣏ࢵࢺࠋ

[1] S. Ichinokura et al., Acs Nano 10, 2761 (2016).
[2] K. Kanetani et al., Proceedings of the National Academy of Sciences 109, 19610 (2012).
[3] Y. Endo et al., Carbon 157, 857-862 (2020). [4] J. C. Kotsakidis et al., Chem. Mater. 32, 6464 (2020).

P-42
Two dimensional ferromagnetism in Cr3Te4 epitaxial thin films grown by molecularbeam epitaxy
ADept. of Appl. Phys., Univ. of Tokyo, BRIKEN CEMS

Yue WangA, Masaki NakanoA,B, Satoshi YoshidaA, Hideki MatsuokaA , Kyoko

IshizakaA,B,

Yoshihiro IwasaA,B
The discoveries of intrinsic ferromagnetism in atomically-thin van der Waals crystals
have opened up a new research field enabling fundamental studies on magnetism at two
dimensional (2D) limit as well as development of magnetic van der Waals
heterostructures [1-4]. However, 2D ferromagnets with high Curie temperature (TC) was
still missing. Recently we have succeeded in growing atomically-thin chromium telluride
epitaxial thin films on insulating sapphire substrates by molecular beam epitaxy (MBE),
and identified its phase as Cr3Te4 based on the detailed analysis on the structural andmagnetic properties. We found that TC of the as-grown samples were about 160 K, but it Fig. 1. Increase of TC by postincreased up to 310 K by post-growth annealing (Fig. 1). Moreover, , we found that those growth annealing in Cr3Te4.
with- and without-annealing samples show different thickness dependence of TC. We will discuss those results in detail.
[1] C. Gong et al., Nature 546, 265 (2017); [2] B. Huang et al., Nature 546, 270 (2017)[3] Z. Fei et al., Nat. Mat. 17, 778 (2018); [4] M. Nakano et al., Nano Letters, 19, 8806 (2019).

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P-43
㻮㼕 ⷧ⭷䛛䜙䛾ບ㉳䝦䝸䝅䝔䜱౫Ꮡ䛩䜛䝔䝷䝦䝹䝒Ἴᨺᑕ㻌
Excitation helicity-dependent terahertz emission from Bi thin films⌮Ꮫ⣔◊✲⛉≀⌮Ꮫᑓᨷ A, ప⛉Ꮫ◊✲䝉䞁䝍䞊B

Department of Physics A, Cryogenic Research Center Bᖹ஭㄃୺ᅾ A, ྜྷᕝᑦᏕ A, ᘅ℩ⴥ⳯ A, Ἑཱྀ┿ᚿ A, ᯘᑗග A, ᓥ㔝ு A, B
Yoshua Hirai A, Naotaka Yoshikawa A, Hana Hirose A, Masashi Kawaguchi A, Masamitsu
Hayashi A, and Ryo Shimano A, B㻌 ࣅࢫ࣐ࢫ(Bi)ࡣࢹ࢕ࣛࢵࢡⓗ࡞ࣂࣥࢻศᩓ࡟㉳ᅉࡍࡿ㧗ຠ⋡ࡢࢫࣆࣥὶ࣭㟁ὶኚ᥮ࡀᮇᚅࡉࢀ࡚࠸ࡿ≀㉁࡛࠶
ࡿࠋ᭱㏆ࠊࡇࡢ Bi ࡢⷧ⭷ヨᩱ࡟࠾࠸࡚ࠊ෇೫ගࢆ↷ᑕࡍࡿ࡜ࠊࡑࡢ࣊ࣜࢩࢸ࢕࡟౫Ꮡࡋࡓග㟁ὶࡀ⏕ࡌࡿࡇ࡜ࡀ
ሗ࿌ࡉࢀࡓ [1]ࠋ ᮏ◊✲࡛ࡣࡇࡢ෇೫ග↷ᑕ࡟ࡼࡾㄏ㉳ࡉࢀࡿග㟁ὶࡢࢲ࢖ࢼ࣑ࢡࢫࢆほ ࡍࡿࡓࡵࠊ▼ⱥᇶᯈୖࡢ Bi ⷧ⭷࡟㏆㉥እࣇ࢙࣒ࢺ⛊ࣃࣝࢫ࣮ࣞࢨ࣮ࢆ↷ᑕࡋ࡚㐣Ώⓗ࡞ග㟁ὶࢆ⏕ᡂࡋࠊࡑࡢ᫬㛫ኚ໬ࢆᨺᑕࡉࢀࡿࢸࣛ࣊ࣝࢶ(THz)Ἴࢆ㏻ࡌ࡚ほ ࡍࡿࡇ࡜ࢆヨࡳࡓࠋࡑࡢ⤖ᯝࠊບ㉳࣊ࣜࢩࢸ࢕࡟౫Ꮡࡍࡿ THz Ἴᨺᑕࢆほ ࡍࡿࡇ࡜࡟ᡂ
ຌࡋࡓ [2]ࠋᮏⓎ⾲࡛ࡣࡇࡢࡼ࠺࡟ࡋ࡚ᨺᑕࡉࢀࡿ THz Ἴࡢ೫ගࠊධᑕゅ౫Ꮡᛶࠊࢧࣥࣉࣝࡢ⭷ཌ౫Ꮡᛶࠊ ᗘ౫Ꮡᛶ࡟ࡘ࠸࡚ࡢ⤖ᯝࢆ⤂௓ࡋࠊග㟁ὶࡢ⏕ᡂ࣭⦆࿴ࡢᶵᵓ࡟ࡘ࠸࡚㆟ㄽࡍࡿࠋ[1] H. Hirose et al., arXiv:2011.06786 (2020)[2] Y. Hirai et al., Phys. Rev. Appl. 14, 064015 (2020)

P-44,-&(?D<9#67)8$'2
 
 


2 =>@B %3  /42 1$'2
2 2 "52 5>A>2 C;:D5 *2 +5.2 0 512 !2O1MhZ"IOY}U %QH#!B^<3c4IO%ET IO\P|t%#ET?%QH#wy8C#:  $&,.' {;t%fkpj2d+0(    
e  B_sS`v%oN6m%iG# c4IOE
TtJX%[~FA  -.*/ ) %  =3VR  %hazr T$l@ZM%>b#I5nq]x7%L D9 
ugKc4IOETt%#QW$

22

P-45
ෆᅉⓗ☢ᛶ䝖䝫䝻䝆䜹䝹⤯⦕య 㻹㼚㻔㻮㼕㻘㻿㼎㻕㻞㼀㼑㻠 ⷧ⭷䛾☢Ẽ㍺㏦≉ᛶ㻌Magnetotransport properties for intrinsic topological insulator Mn(Bi,Sb)2Te4 thin films
ᕤᏛ⣔◊✲⛉㻛≀⌮ᕤᏛᑓᨷ㻛༑಴䞉㔠⃝◊✲ᐊ㻌Ώ㑔❳ኴ䚸ྜྷぢ㱟ኴ㑻䚸ᕝᮧ⛱䚸㔠ᏊⰋኵ䚸ሯ㷂ᩔ䚸㧗ᶫᆂ䚸ᕝ㷂㞞ྖ䚸༑಴ዲ⣖䝖䝫䝻䝆䜹䝹⤯⦕య䛾⾲㠃≧ែ䛷䛿᫬㛫཯㌿ᑐ⛠ᛶ䜢◚䜛䛣䛸䛷㔞Ꮚ␗ᖖ䝩䞊䝹ຠᯝ䛺䛹䛾᪂ወ䛺㔞Ꮚ⌧㇟䛜⏕䛨䜛䚹MnBi2Te4 䛿ෆᅉⓗ䛺☢ᛶ䝖䝫䝻䝆䜹䝹⤯⦕య䛷䛒䜚䚸☢ᛶඖ⣲ Mn 䛾཯ᙉ☢ᛶ⛛ᗎ䛻䜘䜚᫬㛫཯㌿ᑐ⛠ᛶ䛜◚䜙䜜䜛䚹ᡃ䚻䛿 MBE ἲ䛻䜘䛳䛶 Mn(Bi,Sb)2Te4 ⷧ⭷ヨᩱ䜢స〇䛧㟁Ẽ᢬ᢠ≉ᛶ䜢⣔⤫ⓗ䛻ㄪ䜉䛯䚹≉䛻䚸Sb ⤌ᡂไᚚ䛸㟁⏺ຠᯝ䛻䜘䜛䝣䜵䝹䝭‽఩ไᚚ䜢⤌䜏ྜ䜟䛫䜛䛣䛸䛷䚸㟁Ⲵ୰ᛶⅬ௜㏆䛷␗ᖖ䝩䞊䝹ຠᯝ䛜ቑ኱䛩䜛᣺䜛⯙䛔䜢♧䛧䛯䚹᭦䛻䚸☢໬䜼䝱䝑䝥䛾኱䛝䛥䛻⣔䛾஘䜜䜢ྲྀ䜚ධ䜜䛯ィ⟬䛛䜙䚸ほ䛥䜜䛯␗ᖖ䝩䞊䝹ຠᯝ䛾☢

ሙ/ ᗘ౫Ꮡᛶ䛜㔞Ꮚ໬್䛻㏆䛵䛔䛶䛔䛟ᬑ㐢ⓗ䛺᣺䜛⯙䛔䛸ྜ⮴䛧䛶䛔䜛䛣䛸䜢♧䛧䛯䚹ᅗ 0Q%L7H ⷧ⭷The combination of topological band structures and magnetism gives novel topological phases. The recently discovered
MnBi2Te4 is an intrinsic magnetic topological insulator, which shows spontaneous antiferromagnetic orders. In this study,
we performed a systematic study on Mn(Bi,Sb)2Te4 thin films with FET devices. By finely tuning of the Fermi energy
with Sb-doping and FET gating, we observe the topological phase transitions with Sb composition and enhancement of
the anomalous Hall effect. Moreover, quantitative discussion on the magnetic gap and disorder revealed that our results
are consistent with universal behavior towards the quantum anomalous Hall states.

P-46
Ratiometric thermometry based on dehydration-enhanced NIR photoluminescence inlanthanide(III)-copper(I) cyanido-bridged frameworks
Ohkoshi Laboratory, Department of Chemistry, Graduate School of Science
Yue Xin, Szymon Chorazy, Koji Nakabayashi, and Shin-ichi Ohkoshi
Lanthanide-based cyanido-bridged MOF materials have aroused greatscientific attention as promising candidates for developing multifunctionality
like proton conductivity, humidity-sensitive magnetism, photomagnetism andphotoluminescent single-molecule magnet.1 Lanthanide(III) ions as thefunctional centers exhibiting both emission and large magnetic anisotropy are
beneficial to prompting photoluminescent single-molecule magnet behavior
by introducing into cyanido-bridged network.2 Moreover, the durability
relying on the intrinsic stability of cyanido-bridged complexes is just in needof tolerating external stimuli for solvent driven process. In this regard, ourFigure 1. T-dependence of NIR-photoluminescentemission spectra after dehydration (x=0.71, y=0.29).

group presents the three-dimensional cyanido-bridged bimetallic network material, [Nd(2,2’-bpdo)2(H2O)]x[Yb(2,2’bpdo)2(H2O)]1-x[Cu2(CN)5]·5H2O. The NIR luminescent emission can be dramatically enhanced by dehydration, which makes
the Yb-Cu(CN)2 system promising materials to serve as ratiometric luminescent molecular thermometer.
[1] a) S. Ohkoshi et al., Dalton Trans., 2011, 40, 6825-6833. b) S. Ohkoshi et al. Nature Photon., 2014, 8, 65.
[2] S. Chorazy and S. Ohkoshi et al., Chem. Eur. J., 2016, 22, 7371
23

P-47
᭷ᶵᑟయT-(ET)2X 䛻䛚䛡䜛㟁Ⲵ䜺䝷䝇䛾⢏Ꮚ-Ἴື䜽䝻䝇䜸䞊䝞䞊㻌ᕤᏛ⣔◊✲⛉䞉≀⌮ᕤᏛᑓᨷ䞉㮵㔝⏣◊✲ᐊ 1 㛗㇂ᕝ◊✲ᐊ 2ᮧ℩ ⚽᫂ 1, Ⲩ஭ ಇே 2,㛗㇂ᕝ 㐩⏕ 2, ᐑᕝ ࿴ஓ 1, 㮵㔝⏣ ୍ྖ 1ᾮయ䜢෭༷䛩䜛䛸⤖ᬗ໬䛩䜛䚹䛸䛣䜝䛜䚸ఱ䜙䛛䛾᪉ἲ䛷⤖ᬗ໬䜢ጉ䛢䜛䛸䚸㌿⛣ᗘ௨ୗ䛷䜒㐣෭༷≧ែ䛸䛧䛶⣔䛿ᾮయ䛾ᛶ㉁䜢ಖ䛴䛣䛸䛜䛷䛝䜛䚹䛥䜙䛻⣔䜢෭༷䛩䜛䛸䚸↓⛛ᗎ䛺䜎䜎⢏Ꮚ䛾㐠ື䛜෾⤖䛩䜛䚹䛣䜜䜢䜺䝷䝇䛸䛔䛖䚹ᚑ᮶䚸䜺䝷䝇䛾◊✲䛿䚸ཎᏊ䞉ศᏊ䜔䝁䝻䜲䝗䛸䛔䛳䛯ྂ඾⢏Ꮚ䜢ᑐ㇟䛻⾜䜟䜜䛶䛝䛯䚹䛷䛿䚸㔞Ꮚᛶ䜢ᣢ䛴⢏Ꮚ⣔䛾䜺䝷䝇䠄㔞Ꮚ䜺䝷䝇䠅䛿䛹䛾䜘䛖䛺᣺䜛⯙䛔䜢♧䛩䛾䛰䜝䛖䛛䠛㔞Ꮚ䜺䝷䝇䜢◊✲䛩䜛ୖ䛷䚸᭷ᶵᑟయT-(ET)2X 䛿᱁ዲ䛾䝰䝕䝹≀㉁䛷䛒䜛䚹䛣䛾≀㉁୰䛾ఏᑟ㟁Ꮚ䛿䚸ప 䛷㟁Ⲵ⤖ᬗ䛸䛺䜛䛜䚸ᛴ෭䛻䜘䜚⤖ᬗ໬䜢ጉ䛢䜛䛸㟁Ꮚ䛿ప 䛷䜺䝷䝇≧䛻෾⤖䛩䜛䠄㟁Ⲵ䜺䝷䝇䠅[1,2]䚹㟁Ꮚ䛿ᚑ᮶䛾䜺䝷䝇䜘䜚㐶䛛䛻㔞Ꮚᛶ䛜ᙉ䛟䚸㔞Ꮚ䜺䝷䝇≉᭷䛾᣺䜛⯙䛔䛜ᮇᚅ䛥䜜䜛䚹ఏᑟ㟁Ꮚ䛿␗᪉ⓗ୕ゅ᱁Ꮚ䜢ᡂ䛩 ET ศᏊୖ䛻Ꮡᅾ䛧䛶䛚䜚䚸㟁Ꮚ䛾䜺䝷䝇໬䛻䛿୕ゅ᱁Ꮚ䛾␗᪉ᛶ䛜ᙉ䛟㛵䜟䛳䛶䛔 䜛䛣䛸䛜▱䜙 䜜䛶䛔 䜛 [3] 䚹ᮏ◊✲䛷䛿䚸␗᪉ᛶ䛜␗䛺䜛 ୕䛴䛾≀㉁ T-(ET)2X (X=TlCo(SCN)4, RbZn(SCN)4,
CsZn(SCN)4)䜢ᑐ㇟䛸䛧䚸䛭䜜䛮䜜䛾㟁Ⲵ䜺䝷䝇┦䛻䛚䛡䜛 ET ศᏊୖ䛾㟁Ⲵᐦᗘศᕸ䜢䝷䝬䞁ศගἲ䛷ㄪ䜉䛯䚹䛭䛾⤖ᯝ䚸㟁Ⲵᐦᗘ䛿䚸᱁Ꮚ䛜ṇ୕ゅᙧ䛻㏆䛟䛺䜛䜋䛹䚸[0, 1]䛻㏆䛔ྂ඾⢏Ꮚⓗ䛺஧ᴟศᕸ䛛䜙Ἴືⓗ䛺㐃⥆ศᕸ䜈䛸ኚ໬䛩䜛䛣䛸䛜ศ䛛䛳䛯䚹䛣䛾⢏Ꮚ-Ἴື䜽䝻䝇䜸䞊䝞䞊䛿㔞Ꮚ䜺䝷䝇䛻≉᭷䛺⌧㇟䛷䛒䜛䛸⪃䛘䜙䜜䜛䚹[1] F. Kagawa, et al., Nat. Phys. 9, 149 (2013).
[2] T. Sato, et al., Phys. Rev. B 89, 121102(R) (2014).
[3] T. Sato, et al., J. Phys. Soc. Jpn. 83, 083602 (2014).

P-48
༢୍ඖ⣲䝖䝫䝻䝆䜹䝹≀㉁D-Sn 䛻䛚䛡䜛㧗⛣ືᗘ⾲㠃≧ែཬ䜃䝞䝹䜽≧ែ䛾㔞Ꮚఏᑟ㻌
Quantum transport of surface and bulk states with high mobility in elemental
topological material D-Snᮾ኱㟁Ẽ, ᮾ኱⥲ྜ◊✲ᶵᵓ, JST 䛥䛝䛜䛡, ᮾ኱ CSRN㧗℩೺࿃, Le Duc Anh, ℧ཱྀ⪔௓, ⏣୰㞞᫂༢୍ඖ⣲䛷ᵓᡂ䛥䜜䜛䝖䝫䝻䝆䜹䝹≀㉁䃐-Sn 䛿䚸䛭䛾⤌ᡂ䛾༢⣧䛥䛛䜙䚸᪂ወ䝖䝫䝻䝆䜹䝹≀ᛶ䛾᥈⣴䜔䝇䝢䞁䝖䝻䝙䜽䝇ᛂ⏝䛻㝿䛧䛶᭷ᮃ䛷䛒䜛[1]䚹௒ᅇᡃ䚻䛿䚸㉸㧗ရ㉁䛺༢⤖ᬗ䃐-Sn 䜢 InSb(001)㠃ୖ䛻ᡂ⭷䛧䚸㔞Ꮚ㍺㏦≀ᛶ䜢ゎᯒ䛩䜛䛣䛸䛷䚸䃐-Sn 䛜♧䛩䝖䝫䝻䝆䜹䝹≀ᛶ䜢ึ䜑䛶ヲ⣽䛻᫂䜙䛛䛻䛧䛯䚹䃐-Sn 䛾 2 ḟඖ䝖䝫䝻䝆䜹䝹⾲㠃≧ែ䛿䚸㠀⮬᫂䛺䝧䝸䞊఩┦(= -0.62 ~ -0.93䃟)䛸㍍䛔䝃䜲䜽䝻䝖䝻䞁㉁㔞(= 0.035 m0)䜢ᣢ䛱䚸䛭䛾㔞Ꮚ⛣ືᗘ䛿 30000 cm2/Vs 䛻䜎䛷㐩䛧䛯䚹䛣䜜䛿䚸ඛ⾜◊✲䛾⣙ 10 ಸ䛾್䛷䛒䜚[2]䚸䝖䝫䝻䝆䜹䝹≀㉁඲య䜢ぢΏ䛧䛶䜒㠀ᖖ䛻㧗䛔್䛷䛒䜛䚹ຍ䛘䛶䚸௒ᅇ䛿䃐Sn 䛾䝞䝹䜽䝞䞁䝗䛾㔞Ꮚ᣺ື䜒ྠ᫬䛻ほⓎ⾲䛷䛿䚸䛣䜜䜙䛾㔞Ꮚ᣺ື䛜ᣢ䛴䛩䜛䛣䛸䛻ᡂຌ䛧䛯䚹ᗘ䞉ゅᗘ䞉⭷ཌ౫Ꮡᛶ䛻䛴䛔䛶䜒㆟ㄽ䛩䜛䚹ᮏᡂᯝ䛿䚸䃐-Sn 䛜䝖䝫䝻䝆䜹䝹≀ᛶ᥈⣴䛻䛚䛡䜛᪂䛯䛺䝰䝕䝹ᮦᩱ䛻䛺䜚䛖䜛䛣䛸䜢ᐇ㦂ⓗ䛻♧䛩䛸䛸䜒䛻䚸 ༙ᑟయ䝧䞊䝇䛾䝇䝢䞁䝖䝻䝙䜽䝇ᛂ⏝䜈䛾ᒎᮃ䜢㛤ᣅ䛩䜛䜒䛾䛷䛒䜛䚹)LJ  D  Ѝ6Q ͹ 67(0 ଀ E  . Ͳ؏଎͠Ηͪ໎֮͵ྖࢢ৾ಊ

[1] Y. Ohtsubo, et al., PRL 111, 216401 (2013). [2] Q. Barbedienne, et al., PRB 98, 195445 (2018).
24

P-49
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25

P-51
Anisotropic Critical Current Densities in Ba0.6K0.4Fe2As2 Superconductors with Splayed
Columnar Defects
Department of Applied Physics, The University of Tokyo, Japan1
Nishina Center, RIKEN, Japan2
Department of Physics and Mathematics, Aoyama Gaguin University, Japan3*Jiachen Wang1, Ayumu Takahashi1, Sunseng Pyon1, Atsushi Yoshida2, Tadashi Kambara2,
Yue Sun3, Haruhisa Kitano3, Tsuyoshi Tamegai1
Columnar defects (CDs) were proved to enhance the critical current density (Jc) in cuprate superconductors [1], and further
enhancement is reported by splaying the direction of CDs [2]. In the case of Ba1-xKxFe2As2, the Jc enhancement also occurs
with a non-monotonic field dependence, namely the anomalous peak effect [3,4].
In the present study, Ba0.6K0.4Fe2As2 crystals were irradiated by 2.6 GeV U ions from two directions, each with a doseequivalent magnetic field BΦ = 4 T. By introducing splayed CDs, which break in-plane symmetry, Jc is expected to have anin-plane anisotropy [5]. As a result, the two components Jpara and Jperp that are parallel and perpendicular to the splay plane,
respectively, need to be figured out to determine which component contributes more to the anomalous peak effect. After
picking up two rectangular pieces with different aspect ratios from the original sample, Jc in the two directions were evaluatedto reveal the splayed CDs-induced anisotropy in in-plane Jc. Calculated magnetic field dependence of in-plane anisotropyof Jc clearly shows that Jpara contributes more to the anomalous peak effect at around 25 kOe.
[1] L. Civale et al., Phys. Rev. Lett. 67, 648 (1991).
[2] L. Krusin-Elbaum et al., Phys. Rev. Lett. 76, 2563 (1996).
[3] A. Takahashi et al., J. Phys. Soc, 89, 094705 (2020).
[4] A. Park et al., Phys. Rev. B 97, 064516 (2018).
[5] A. Park et al., Physica C 530, 58 (2016).

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26



P-53
(Eu,Y)MnO3 䛾䜶䝺䜽䝖䝻䝬䜾䝜䞁ඹ㬆䛻䛚䛡䜛㟁Ẽ☢ẼගᏛຠᯝ䛾඲యീ㻌Comprehensive study of optical magnetoelectric effect via electromagnon resonance in(Eu,Y)MnO3
ᕤᏛ⣔◊✲⛉≀⌮ᕤᏛᑓᨷ㧗ᶫ◊✲ᐊⲶ㔝ᵞᏊ䚸㔠ᏊⰋኵ䚸༑಴ዲ⣖䚸㧗ᶫ㝧ኴ㑻ϘϫϔηΩ΢φϜϱΪϱ࢐Կ෼ʤRMnO3ʥͶେන͠ΗΖϜϩοϓΥϫ΢έηͲͺɼηϒϱ஡঄Ͷ༟པͪ͢‫ک‬༢ు੓͗൅‫ͤݳ‬ΖͪΌͶ‫ڌ‬୉͵ు‫ްـࣕـ‬ՎΝࣖͤɽ͞Ηͺు‫ްָޭـࣕـ‬Վͳ͢ͱޭָԢ౶Ͷ΍‫ݳ‬ΗΖɽు‫ـࣕـ‬τϱλϩ͹ඉଲֱߴɼଲֱߴͺͨΗͩΗඉ૮ൕ๏޴  ৯੓ɼડޭ੓෵۸઄ͳ‫ͻݼ‬ΗΖ‫ౕک‬ΏยޭͶ‫ͤؖ‬Ζඉ૮ൕʤޭ͹਒ߨ๏޴ͶΓΕෘߺ͗ҡ͵Ζʥ‫ݳ‬েΝࣖͤɽ͏ͥΗ΍ RMnO3 ͹ΦϪέφϫϜήόϱ‫ڠ‬໒Ͷ͕͏ͱ؏଎͠
Ηͱ͏Ζ[1,2]ɽRMnO3 ͺ‫ྪౖس‬΢Ψϱ͹ൔ‫ܚ‬ͶΓΕ֪ࢢ࿬Νղ͢ͱࣕ‫ـ‬૮‫͗༽ࡠޕ‬୉͚͘ร௒͠Η༹ʓ͵ࣕ‫ـ‬૮ࣰ͗‫ͤݳ‬ΖɽಝͶ Eu1-xYxMnO3 ͺ‫ྪౖس‬΢Ψϱ͹ηϒϱࣕ੓͗͵͏ͪΌɼ࿊କద͵ࣕ‫ـ‬૮‫༽ࡠޕ‬͹รԿ͗ਫ਼ͣΖɽຌ‫Ͳڂݜ‬ͺ Eu1-xYxMnO3(x=0.3,0.4,0.45,0.5)͹ 4 ͯ͹ૌ੔Ͷ͕͏ͱɼඉ૮ൕ๏޴ 2 ৯੓ͳડޭ੓෵۸઄͹଎ఈΝ
ߨͮͪɽ
ͨ͹݃Վɼ
ඉ૮ൕ๏޴ 2 ৯੓͹୉͘͠͹ૌ੔ғଚ੓ͺు‫ـ‬෾‫ۅ‬͹ૌ੔ғଚ੓ͶηίʖϩͤΖ͹Ͷଲ͢ͱɼડޭ੓෵۸઄͹୉͘͠ͺҡ͵Ζૌ੔ғଚ੓Νࣖͪ͢ɽ͞Ηͺ֦ޭָްՎΝࣖͤΦϪέφϫϜήόϱ͗੫ద͵෾‫ۅ‬͹ਫ਼ͣΖ‫ͳߑؽ‬ଲԢ͢ͱ͏Ζ͖൳͖ͶғଚͤΖͳߡ͓ΔΗΖɽ
[1] Y. Takahashi et. al., Nat. Phys. 8, 121 (2012).
[2] M. Ogino et al., Phys. Rev. Research. 2, 023345 (2020).

P-54ᙉㄏ㟁ⓗ䛻ศᴟ䛜ಖᣢ䛥䜜䜛㖡㻙䜸䜽䝍䝅䜰䝜䝰䝸䝤䝕䞁㘒య㟁Ẽ໬Ꮫⷧ⭷㻌
Electrochemical Thin Film of Copper-octacyanidomolybdate Assembly Showing
Ferroelectric Polarization Retention
Ohkoshi laboratory, Department of Chemistry, School of Science㻌Yusuke Ikeda, Kosuke Nakagawa, Kenta Imoto, Koji Nakabayashi, Shin-ichi Ohkoshi
4

Switching polarization / nC·cm-2

Cyanido-bridged metallic assemblies, which is composed of metal cations alternately
5ms
bridged by cyanido ligands, have been paid much attentions due to their novel physical3
10ms
properties and functionalities. Our group has reported copper-octacyanidomolybdate
25ms
50ms
II [MoIV(CN) ] 㽂 8H O) show photo induced magnetization andassembly(Cu 2
8
2
2
100ms
250ms
1
ferroelectricity in its powder sample. In this research, thin film type of copper500ms
octacyanidomolybdate assembly was synthesized in the electrochemical method, and1
the polarization retention was observed and evaluated by PUND method.2
0Thin film type of copper-octacyanidomolybdate assembly(CuMo) was synthesized by80
100 120 140 160 180 200
applying the voltage at a constant potential condition of +500 mV vs Ag/AgCl reference
Temperature / K
electrode to a HNO3 aqueous solution where Na3[MoV(CN)8]㽂4H2O and CuII(NO3)㽂
Figure1: Polarization retention plot
3H2O dissolve. From the characterization of CuMo, the chemical formula proved to
be Cu2[Mo(CN)8] 㽂 8.0H2O and cyanide ligands bridge between CuII and MoIV. Next, we conducted electric property
measurement of CuMo, and the hysteresis loops were observed at several temperatures. In order to examine these hysteresis
loops in detail, we evaluate its polarization retention by the PUND method. As a result, the small polarization which is 0.1-1
nC/cm2 was retained without electric field, and these polarization retention was relaxed gradually (Figure 1).
[1] S. Ohkoshi, N. Machida, Z. J. Zhong, K. Hashimoto, Synth. Met., 122, 523 (2001).
[2] J. F. Scott, C. A. Araujo, H. Brett Meadows, L. D. McMillan, A. Shawabkeh, J. Appl. Phys., 66, 1444 (1989).
27

P-55
㠀┦཯䝔䝷䝦䝹䝒➨䠎㧗ㄪἼⓎ⏕䛛䜙ぢ䜛㻌 ㉸ఏᑟ 㻺㼎㻺 䛻䛚䛡䜛☢᮰㔞Ꮚ䝎䜲䝘䝭䜽䝇㻌Vortex dynamics in superconducting NbN illuminated by nonreciprocal THz SHGAప⛉Ꮫ◊✲䝉䞁䝍䞊䞉◊✲㛤Ⓨ㒊㛛䚸B ⌮Ꮫ⣔◊✲⛉䞉≀⌮Ꮫᑓᨷ䞉ᓥ㔝◊✲ᐊ䚸
C ᝟ሗ㏻ಙ◊✲ᶵᵓ(NICT)䞉ᮍ᮶ ICT ◊✲ᡤ୰ᮧ⚈Ꮚ A䚸຾ぢᜏኴ B䚸ᑎ஭ᘯ㧗 C䚸ᓥ㔝ு A,Bὶ䜜䛾᪉ྥ䛻䜘䛳䛶㍺㏦≉ᛶ䛜ኚ໬䛩䜛䛂㠀┦཯ᛶ䛃䛿䚸ὶ䜜䛾᪉ྥ䜢཯㌿䛥䛫

直流電流䜛ᗙᶆኚ᥮䠄౛䛘䜀✵㛫཯㌿䜔᫬㛫཯㌿䠅䛻ᑐ䛧䛶ኚ໬䛩䜛䠄䠙ᑐ⛠ᛶ䛜◚䜜䛯䠅

磁束量子⣔䛻䛚䛔䛶⌧䜜䜛䚹䛭䛣䛷䚸➼᪉ⓗ䛺➨II✀㉸ఏᑟయNbN䛾ⷧ⭷䛻┤ὶ㟁ὶ䜢ὀධ䛧䛶ேⅭⓗ䛻✵㛫䞉᫬㛫཯㌿ᑐ⛠ᛶ䜢◚䛳䛯≧ែ䛷䚸⊃ᖏᇦ䝔䝷䝦䝹䝒Ἴ䝟䝹䝇䜢↷ᑕ䛩䜛䛸䚸㏱㐣Ἴ䛻䚸㠀┦཯ᛶ䛻⏤᮶䛩䜛ᕧ኱䛺➨䠎㧗ㄪἼ(SH)䛜⌧䜜䛯[1]䚹
SHᙉᗘ䛾ᗘ౫Ꮡᛶ䛻䛿ඹ㬆䝢䞊䜽䛜ほ䛥䜜䛯䚹ᗘୖ᪼䜔㟁ὶὀධ䛻䜘䜚ᅗ  䝢䞁Ṇ䜑䛥䜜䛯☢᮰㔞Ꮚ䛾㐠ື䛸➨䠎㧗ㄪἼⓎ⏕䛾ᴫᛕᅗ䚹☢᮰㔞Ꮚ䛾䝢䞁Ṇ䜑䜢ᙅ䜑䜛䛸ඹ㬆࿘Ἴᩘ䛜పୗ䛩䜛䛾䛷䚸䝢䞁Ṇ䜑䛥䜜䛯☢᮰㔞Ꮚ䛜SH䛾㉳※䛷䛿䚸䛸⪃䛘䚸ヨᩱ䜢☢ሙ୰䠄1 Oe䠅䛷෭༷䛩䜛䛸䚸䛯䛧䛛䛻SH䛾ᙉᗘ䛜ቑ኱䛧䛯䚹䛭䛣䛷䚸ᅗ䠍䛾䜘䛖䛻䚸┤ὶ㟁ὶ䛻䜘䛳䛶ഴ䛡䜙䜜䛯䝢䞁Ṇ䜑䝫䝔䞁䝅䝱䝹䛾ᗏ䛷䚸䝔䝷䝦䝹䝒㟁ሙ䛻ㄏ㉳䛥䜜䛯㉸ఏᑟ㟁ὶ䛻㥑ື䛥䜜䚸᣺ື䛧䚸㟁☢Ἴ䜢ᨺᑕ䛩䜛☢᮰㔞Ꮚ䛾䝰䝕䝹䜢❧䛶䚸ඹ㬆࿘Ἴᩘ䛛䜙☢᮰㔞Ꮚ䛾㉁㔞䚸ඹ㬆䛾⥺ᖜ䛛䜙⢓ᛶ䜢Ỵᐃ䛧䛯䛸䛣䜝䚸ほ 䛥䜜䛯SH㟁ሙ䜢ᐃ㔞ⓗ䛻ㄝ᫂䛷䛝䛯䚹䛣䛾㠀┦཯䝔䝷䝦䝹䝒➨䠎㧗ㄪἼ䛿䚸☢᮰㔞Ꮚ䛾㉸㧗㏿䝎䜲䝘䝭䜽䝇䛾᪂䛧䛔䝥䝻䞊䝤䛸䛺䜛䛸ᮇᚅ䛥䜜䜛䚹
[1] S. Nakamura, K. Katsumi, H. Terai, and R. Shimano, Phys. Rev. Lett. 125, 097004 (2020).

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