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ê½Ba Í¯ÊÌwÆÄÎêCBCS _ÉæéÆ aBCSæé¤8)É¨¢ÄC_f¯ÊÌu·Éº¤tHmÌü0.5ÅgÌÏ»©ç\ª³êé 6 ÷öxi1| 16/18jÌ{]èC]^Ì´`±ÌÅÍ±êªÇ­ÄÍÜúËõ March 2012 Vol.25 No.2  121(C) 2012 The Japanese Society for Synchrotron Radiation ResearchÌ[hGlM[Ì\tg»i3.7}0.8 meVjªñéuãNõGlM[ÌÂÏ«vðp·é±ÆªoéB³ê½B±ÌÊÍCARPES ÅÏª³êéLN\¢±ÌãNõGlM[ÌÂÏ«Ìdv«ð Fig. 2 É¦·BÉ¯öxÌ¯ÊÌøÊª¶Ý·éÂ\«ð¦´µÄ¢éBhn7.5 eV ÌêCCu 3dx _y ohªñwªôµ½22»±ÅCÀ±¸xÉDê½áGlM[ãNúËõðp¢É½ohÉæéñÌtF~ÊiFig. 2(ajjªÏ

½ ARPES ÉæèC_f¯ÊÌøÊÌ¸§ÈØðLåª³êé9)Bm[hûüÅÍC±ÌñÂÌohªßÚµwúËõÈw¤Z^[iHiSORjÌ BL_9A ÉÄsÁÄ¶Ý·é½ßCLN\¢ÌèÊIÈðÍª¢ïÆÈé½4)B

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ihn7.0 eVjCohÌ­xªµ­}§³êC½Êªð\ÌüãvCuõdqÌEo[xÌåioNq´ohÉæéPêÌtF~ÊiFig. 2(bjjâohª«ÌüãjvÆ¢Á½bgÉÁ¦CúËõÌÁ¥ÅUiFig. 2(djjðIðIÉ¾é±ÆªoéB±ÌÊÍCIóÔøÊªáGlM[ÌæÉ¨¢Ä°É\êé±ÆÉNöµÄ¢éBÅKh[v Bi2212É¨¯é EF ÅÌT^IÈ MDC ¼lSÍ0.008 Å|1 ÈºÅèiFig. 2(d)ÌüjCñíÉs¢±q\¢ªÏªÂ\ÅéB±¤µÄ¾çê½¾ÄÈ ARPES C[WÉÎµÄ MDC ðÍ©çCGlM[É^®ÊªUÖWðèµ½iFig. 2(ejjB
Fig. 2(f)Í 16OC18O ¿Ìm[hûüÌªUÖWðärµ½àÌÅC_f¯ÊÌøÊÍGlM[¤ÅÍÈ­C70 meV tßÌLN\¢üÓÌáGlM[ÌæÉÍ©
É¶ÝµÄ¢é±Æªí©éB±Ì÷¬È_f¯ÊÌøÊ
Fig. 1(a) Nodal dispersion of Bi2212 from 16O (blue) and 18O(red). (b) Left­hand shows EDC at the k­point indicated byan arrow. Right­hand plots the band bottom from EDC(0, p) symmetry line (horizontalpeaks along the (0, |p)_lines in the inset).

ðèÊ»·é½ßÉC¡¿Éí½ÁÄ¯lÌªèðs¢C©ÈGlM[Ì±oðsÁ½B©ÈGlM[ÌÀiFig. 2(gjjjCiFig. 2(hjjÌÇ¿çàC70 meV
tßÉ_f¯ÊÌøÊª\êÄ¢é±Æªí©éBFig. 2Fig. 2 (a), (b) Fermi surface maps of Bi2212 taken with 7.5 and 7.0 eV photons, respectively. (c), (d) ARPES imagemaps near the Fermi level (EF) taken with 7.5, 7.0, respectively, along the nodal direction, indicated by the redline in (a) and (b). MDCs at EF are also shown by the white line, where the BB and AB denote bonding band andantibonding band, respectively. (e) Typical nodal ARPES image taken with 7.0 eV below 10 K, where the blackline was determined by the tting MDCs. (f) Precise nodal dispersion of 16O (blue) and 18O (red) obtained from
7.0 eV data. In (c)_(f), the Fermi momentum (kF) is set to the momentum of the AB crossing EF. (g) Real partof the self­energy Re S(v) from ve samples both for 16O (blue lines) and 18O (red lines) along the nodal direc­
tion, which are normalized by the peak maximum, are also oset for clarity. (h) Imaginary part of the self­energy
Im S(v) determined from MDC full widths. An impurity scattering term at v0 is subtracted assuming anenergy independent constant background. (i), (j) Obtained kink energy as a function of sample numbers bothfor 16O (blue) and 18O (red) from Re S(v) and Im S(v), respectively.

122  úËõ March 2012 Vol.25 No.2úËõj(i), (j)ÍC©ÈGlM[ÌÀCÌ70 meV tßÌÏÈ_©çèµ½LN\¢ÌGlM[ÊuÅ[X ¡ æ16ñú{úËõwï§ãÜóÜ¤ñhÌÖ^ðæèx·éàÌÆl¦çêéBêûCßNÅéBÍClXÈGlM[É¨¢ÄC±qÆ¡Ì[hÆ_f¯ÊÌu·ÉÆàÈ¢i16O¨18OjCÀyÑ©

Ìð¦´·éñªÈ³êÄ¢éB¡ãC÷×ÈXyç  ß ½ L  N Ì G l  M [ Ê u ª » ê ¼ ê 3.4} 0.5Ng\¢ÉÎ·é_f¯ÊÌøÊð¸§ÉØ·é±Æ

meVC3.2}0.6 meV GlM[ª¸­µÄ¢éi\tgÉæèC±qÆ·é{]Ì[hðÁè·é±Æ»µÄ¢éj±ÆªmFÅ«éBªÅ«éÆúÒ³êéBLNÌGlM[Êuivkink jÆtHmU®[hGlM[iVjÌÖWÉÍC»ÝñÊèÌðßªéBêÂÍCA`m[hi´`±Mbvjðîµ½tHm
ÌUßöðl¦½àÌÅéB±ÌCLNÌGl3ÎõË¶ ARPES Éæé Sr2RuO4 ´`±ÌÌ÷×dq\¢ÌIðIÏª±êÜÅÉ¦µÄ«½ohªUÌ¸§èâ©ÈGlM[ÊuÍ[hÌGlM[Æ´`±MbvÌÅå

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lÌaÆµÄ\³êé½ßivkink V{Dmax jCÏª³êh\¢ªärIPÈ¨¿ÉÀçêÄ¨èCSr2RuO4 ´`½LNÌGlM[ðl¦éÆCobNOtHm

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[hi36 meVjªÖ^µÄ¢éÂ\«ªÜ½×ÚµÄ¶Ý·éêÍÉßÄ¢ïÅé10)Bà¤Á½12) B»êÂÌðßÍCm[h©çm[hÖÌtHmÌUßö±Å CäXÍ úËõÌ¼ üÎõÁ«Ì pÉ

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[^[r[CiBL_1jÊuÍ[hÌGlM[ÆµÄ\³êé½ßivkink ÉÎõË¶ªð\ ARPES uðÝµCx»ðißVjCu[WOtHm[hi69 meVjªÖ^µÄÄ«½Bé11) Bµ©µCobNOCu[W{ u ÍC ª ð\ õd qGl M [ ªÍí iVG_OtHmÌ[hGlM[©ç_f¯ÊÌVtgðScienta Ð R4000jðúËõÌõ²ÌÜíèÉ´^óð\ª·éÆC»ê¼ê2.1 meVC3.9 meV ÆÈé½ßCÏÛÁ½ÜÜ90xñ]·é±ÆÅCª³ê½_f¯ÊÌVtgÍCu[WOtHm[É¼zuis ÎõzujðØèÖ¦é±Æªoé¢éÂ\«ªFig. 3½zui p Îõzuj(a), (b) Fermi surface (FS) mapping measured with 65 eV photons at 10 K using p­ and s­polarization, respec­tively, where the inset schematically display the ARPES geometry. (c), (d) MDCs at EF for p­ (upper) and s­polarization (lower) sliced from the FS along GM and GX lines, respectively [white lines in (a) and (b)]. (e), (f)
ARPES images in the ka_kz plane acquired with 22 to 70 eV photons at 10 K using p­polarization along the GMand GX planes, respectively, where the experimentally determined kz dispersion is indicated by grey, red, and bluemarks for a, b, and g FS sheets, respectively. (g), (i) Theoretical kz dispersions along the GM (ZM) plane calcu­
lated by LDA without and with the spin­orbit interaction (SOI), respectively. (h), (j) Same as (g) and (i), ex­
cept that the plane is perpendicular to the GX (ZX) line. (k), (l) ARPES images acquired along the GM line (yel­low line in inset) with 48­eV photons using p­ and s­polarization, respectively, where the white marks and black
dashed lines represent the MDC­derived energy­momentum dispersion and the linear dispersion connecting thetwo points at EF and 150 meV.

úËõ March 2012 Vol.25 No.2  123

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