bluuebunny/crossref_metadata_2025_split huggingface dataset:
Revisiting Anderson-Higgs mechanism: application of Lieb-Schultz-Mattis theorem
Authors: Tada Yasuhiro 
Published: March 2022

Abstract
We consider an electron model of superconductivity on a three-dimensional lattice where there are on-site attractive Hubbard interaction and long-range repulsive Coulomb interaction. It is claimed that fully gapped s-wave superconductivity within this model, if present, exhibits spontaneous translation symmetry breaking possibly related to a charge order. Our discussions are based on an application of the Lieb-Schultz-Mattis theorem under some physical assumptions. The inconsistency between the proposed supersolid and experiments can impose some constraints on a reasonable choice of a theoretical model.
Field-Induced Quantum Spin Nematic Liquid Phase in the S=1 Antiferromagnetic Heisenberg Chain with Additional Interactions
Authors: Sakai Tôru , Nakano Hiroki , Furuchi Rito , Okamoto Kiyomi 
Published: March 2022

Abstract
The magnetization process of the S = 1 antiferromagnetic chain with the single-ion anisotropy D and the biquadratic interaction is investigated using the numerical diagonalization. Both interactions stabilize the 2-magnon Tomonaga-Luttinger liquid (TLL) phase in the magnetization process. Based on several excitation gaps calculated by the numerical diagonalization, some phase diagrams of the magnetization process are presented. These phase diagrams reveal that the spin nematic dominant TLL phase appears at higher magnetizations for sufficiently large negative D.
Magnetic and transport properties of a new ferromagnetic orthorhombic compound CePtAl2
Authors: Hayashi H , Matsuoka E , Sugawara H , Sakurai T , Ohta H 
Published: March 2022

Abstract
We have synthesized polycrystalline samples of CePtAl2 by arc melting method and examined their magnetic, transport and thermal properties by measuring the magnetization, the electrical resistivity, and the specific heat down to 0.4 K. As a result of these measurements, we found that CePtAl2 is a ferromagnetic Ce-based compound with the Curie-temperature Tc = 2.7 K.
Magnetic-field-tuned valence susceptibility in CeCo1−x
Fe
x
Si revealed by magnetostriction
Authors: Correa V F , Curci I , Sereni J G , Caroca Canales N , Geibel C 
Published: March 2022

Abstract
We report magnetoelastic studies in the CeCo1−x
Fe
x
Si alloys. Iron doping has a profound effect on the low temperature linear magnetostriction. At T = 2 K, the strength of the magnetostriction peaks at x = 0.23 where it reaches a value as large as

Δ
L

L

=
3
×

10

−
3

in an applied magnetic field B = 16 T. This Fe concentration corresponds to the critical one xc above which long-range antiferromagnetic order is no longer observed. The progressive increment of the hibridization between the Ce 4f orbital and the conduction band, as the magnetic order vanishes, gives rise to a sizeable valence susceptibility that can be finely tuned by the magnetic field explaining the large magnetostrictive effect around xc
. At higher x, the magnetostriction decreases, in agreement with a weaker valence susceptibility resulting from a stronger hibridization.
Modeling of Co impurity in Cu host using DFT+ED
Authors: Tchaplianka M , Shick A B , Kolorenč J 
Published: March 2022

Abstract
We investigate the electronic structure of a cobalt atom in a copper host using the density functional theory and the exact diagonalization of an Anderson impurity model. The spectral functions and spin moments at the impurity are calculated and are found to be close the ones calculated by DFT+QMC [1].
Coherent, time-correlated tunneling of density wave electrons
Authors: Miller John H , Suárez-Villagrán Martha Y 
Published: March 2022

Abstract
A growing body of evidence reveals that charge density wave (CDW) transport is a high-temperature cooperative quantum phenomenon. According to the time-correlated soliton tunneling (ST) model, quantum solitons, or electron-phonon correlates within the CDW condensate, act much like electrons tunneling through a Coulomb-blockade tunnel junction. Pair creation of charged fluidic soliton droplets is prevented by their electrostatic energy below a Coulomb-blockade threshold electric field. Above threshold, the quantum fluid flows in a periodic fashion, via a hybrid between Zener-like and coherent Josephson-like tunneling. We summarize the time-correlated ST model and compare model simulations with experiment. The ST model shows excellent agreement with coherent voltage oscillations, and with CDW current-voltage characteristics. Finally, we discuss implications for physics and potential applications.
Photoinduced Phase Transition in Two-Band model on Penrose Tiling
Authors: Inayoshi Ken , Murakami Yuta , Koga Akihisa 
Published: March 2022

Abstract
We study the effects of the photo irradiation on the band insulating state in the two-band Hubbard model on the Penrose tiling. Examining the time- and site-dependent physical quantities, we find that the excitionic state is dynamically induced with site-dependent order parameters. It is also clarified that, in the excitonic state induced by the photo irradiation, local oscillatory behavior appears in the electron number as well as in the order parameter, which should be characteristic of the quasiperiodic lattice.
Crystal-field excitations and quadrupolar fluctuations of 4f-electron systems studied by polarized light scattering
Authors: Ye M , Kung H H , Rosa P F S , Rosenberg E , Kim J , Xu X H , Bauer E D , Fisk Z , Fisher I R , Cheong S W , Blumberg G 
Published: March 2022

Abstract
We present Raman-scattering results for three materials, CeB6, TbInO3, and YbRu2Ge2, to illustrate the essential aspects of crystal-field (CF) excitations and quadrupolar fluctuations of 4f-electron systems. For CF excitations, we illustrate how the 4f orbits are split by spin-orbit coupling and CF potential by presenting spectra for inter- and intra-multiplet excitations over a large energy range. We discuss identification of the CF ground state and establishment of low-energy CF level scheme from the symmetry and energy of measured CF excitations. In addition, we demonstrate that the CF linewidth is a sensitive probe of electron correlation by virtue of self-energy effect. For quadrupolar fluctuations, we discuss both ferroquadrupolar (FQ) and antiferroquadrupolar (AFQ) cases. Long-wavelength quadrupolar fluctuations of the same symmetry as the FQ order parameter persists well above the transition temperature, from which the strength of electronic intersite quadrupolar interaction can be evaluated. The tendency towards AFQ ordering induces ferromagnetic correlation between neighboring 4f-ion sites, leading to long-wavelength magnetic fluctuations.
CeNi4Cr compound and its thermodynamic properties
Authors: Zapotoková Mariana , Reiffers Marián 
Published: March 2022

Abstract
CeNi5 as a mother compound is well known as a Stoner enhanced paramagnet characterized by the spin fluctuation contribution on its transport properties. Previous work on CeNi4Cr compound showed typical features of mixed valence systems with indication of tendency to heavy fermion behavior [1]. The theoretically predicted phase transition into antiferromagnetic order wasn’t observed down to 2 K. In this work we present the effect of spin fluctuations of the CeNi4Cr compound focused on its thermodynamic properties
Extremely High magnetoresistance and quantum Oscillation study of WTe2 Weyl Semimetal
Authors: Singh Abhishek , Sasmal Souvik , Iyer Kartik K , Thamizhavel A , Maiti Kalobaran 
Published: March 2022

Abstract
Single crystals of WTe2 have been prepared using the flux method. Analysis of the x-ray diffraction pattern shows the pure phase of the sample. Temperature dependent resistivity indicates the metallic nature of the sample. The residual resistance ratio of the sample has been found very high providing further evidence of the good quality of the crystals. Extremely high magnetoresistance has been observed in the sample. Quantum oscillations have been seen at high field. Fast Fourier transformation of the quantum oscillations shows nearly the same size of the electron and hole pocket in the sample.
Mössbauer effect study of a polycrystalline Fe1+xCr2-xO4 spinel grown by solid-state synthesis
Authors: Cherosov M A , Zinnatullin A L , Batulin R G , Kiiamov A G , Yusupov R V , Taurskii D A 
Published: March 2022

Abstract
Polycrystalline FeCr2O4 samples have been synthesized by the solid-state reaction method and studied with X-ray diffraction and Mössbauer spectroscopy. Rietveld refinement of X-ray diffraction pattern has been performed; obtained unit cell parameters are in a good agreement with ones in the literature. Mössbauer spectra were measured at room temperature and reveal by two components originating from the A and B sites of the spinel structure occupied by iron ions.
The surface tension at the metal-insulator phase transition in the magnetic field
Authors: Dubovskii L.B. 
Published: March 2022

Abstract
Any metal-insulator transition in a crystalline matter must be the transition from a situation in which the electronic bands overlap to that when they do not [1]. On the basis of the phenomenological theory [2], various singularities are considered in the magnetic field for the surface tension at the metal-insulator contact. The surface tension displays also the quantum magnetic oscillations at low temperatures [3]. The consideration is applied to the Mott insulator in the magnetic field.
Adiabatic specific heat measurement at very low temperatures using GM refrigerator
Authors: Nishioka Takashi , Moriyama Kazuaki , Okazaki Takuto , Miyamoto Satoru , Kado Tsuneo 
Published: March 2022

Abstract
We have developed an adiabatic specific heat measurementt using a 4 K GM refrigerator system that can measure down to 1.3 K with exactly the same accuracy as liquid helium environmen. The cryogenic environment can be obtained by liquefying about 20 L of helium gas at room temperature into a 1 K pot by a cascade method and evacuating it with a rotary pump. The 1 K pot temperature reaches 1.2 K. The specific heat measurement probe is mounted on the 1 K pot and is covered with three radiation shields, and the helium liquefied in the 1 K pot is maintained for about 70 minutes after the refrigerator is stopped, and the 1 K pot temperature maintains below 1.5 K. In this state, the specific heat from 1.3 K to 10 K can be measured. By tightly fixing the adenda to the support (base), temperature fluctuations due to mechanical vibration of the refrigerator can be greatly suppressed, and above 2.5 K, specific heat measurement with almost the same accuracy as when the refrigerator is stopped can be performed. By combining these two types of measurements, we can measure the specific heat with exactly the same accuracy as in a liquid helium environment.
First measurements on the Timespot1 ASIC: a fast-timing, high-rate pixel-matrix front-end
Authors: Piccolo L. , Cadeddu S. , Frontini L. , Lai A. , Liberali V. , Rivetti A. , Stabile A. 
Published: March 2022

Abstract
This work presents the first measurements performed on the Timespot1 ASIC. As the second prototype developed for the TimeSPOT project, the ASIC features a 32 × 32 channels hybrid-pixel matrix. Targeted to space-time tracking applications in High Energy Physics experiments, the system aims to achieve a time resolution of 30 ps or better at a maximum event rate of 3 MHz/channel with a data driven interface. Power consumption can be programmed to range between 1.2 W/cm2 and 2.6 W/cm2. The presented results include a description of the ASIC operation and a first characterization of its performance in terms of time resolution.
EXFOR-NSR PDF database: a system for nuclear knowledge preservation and data curation
Authors: Zerkin V.V. , Pritychenko B. , Totans J. , Vrapcenjak L. , Rodionov A. , Shulyak G.I. 
Published: March 2022

Abstract
Current needs of nuclear science and technology include complete, well-documented, and easily verifiable nuclear data. The complete data records require supporting nuclear bibliography, presently stored in dedicated libraries, in addition, to actual data. Experimental nuclear reaction data (EXFOR) and Nuclear Science References (NSR) databases contain compilations based on primary (journals) and secondary (conference proceedings, theses, preprints, etc.) publications, and data received from authors via private communications. The secondary library materials and private communications often represent a bottleneck for nuclear data verification, compilation, evaluation, and dissemination activities. To address this issue, bibliographic materials were scanned into PDF (Portable Document Format) files and uploaded in a relational database.

The traditional scope of nuclear databases that includes meta-data and numbers derived from data in specialized formats was broadened to accommodate the large volumes of original nuclear data publications. The complete PDF publication files were stored in a relational database as Binary Large OBjects (BLOB). This unique collection of nuclear data compilations and supporting publications generate many opportunities for machine learning applications.

The Web interfaces for authorized and public access to the EXFOR-NSR nuclear publications database were implemented at the U.S. National Nuclear Data Center, https://www.nndc.bnl.gov/ and IAEA Nuclear Data Section, https://www-nds.iaea.org/. The current system is complementary to major nuclear libraries and narrowly focused on nuclear data compilation and evaluation procedures. The contents of the PDF database, details of implementation, and Web interface are described. New capabilities for data curation, knowledge preservation, worldwide dissemination, and natural language processing (NLP) applications are given.
Spatiotemporal heterogeneities in water and land appropriations related to food losses and waste in China
Authors: Li Meng , Zhuo La , Liu Yilin , Yan Chenjian , Wu Pute 
Published: March 2022

Abstract
Fast-growing food losses and waste (FLW) have caused major environmental issues, yet little is known about the role of trade in the inefficient resource consumption related to FLW. In this study, we estimated the inter-annual water footprints (WFs) and land footprints (LFs) related to FLW in consideration of associated inter-provincial virtual water (VW) and virtual land (VL) flows within China from 2000 to 2017. Additionally, differences between eating at home and out in rural and urban regions were distinguished. The FLW-related WF and LF showed 1.5- and 1.2-fold increasing trends, respectively, over the study period. Eating at home in rural regions caused the most FLW and associated water and land appropriations. Both FLW-related gross inter-provincial VW and VL flows increased by 99% and 22% during the study period, respectively, and inter-provincial VW and VL flows in corresponding FLW-related WF and LF differed significantly. In addition, food losses were found to cause more inefficient resource consumption than food waste. This analysis shows that the substantial role of FLW in shaping the intra-national food-related VW and VL networks, and that the policies for FLW diminution at the food supply chain stage are as important as those at the consumption stage.
Infrared cavity ring-down spectroscopy for detecting non-small cell lung cancer in exhaled breath
Authors: Larracy Robyn , Phinyomark Angkoon , Scheme Erik 
Published: March 2022

Abstract
Early diagnosis of lung cancer greatly improves the likelihood of survival and remission, but limitations in existing technologies like low-dose computed tomography have prevented the implementation of widespread screening programs. Breath-based solutions that seek disease biomarkers in exhaled volatile organic compound (VOC) profiles show promise as affordable, accessible and non-invasive alternatives to traditional imaging. In this pilot work, we present a lung cancer detection framework using cavity ring-down spectroscopy (CRDS), an effective and practical laser absorption spectroscopy technique that has the ability to advance breath screening into clinical reality. The main aims of this work were to (1) test the utility of infrared CRDS breath profiles for discriminating non-small cell lung cancer (NSCLC) patients from controls, (2) compare models with VOCs as predictors to those with patterns from the CRDS spectra (breathprints) as predictors, and (3) present a robust approach for identifying relevant disease biomarkers. First, based on a proposed learning curve technique that estimated the limits of a model’s performance at multiple sample sizes (10–158), the CRDS-based models developed in this work were found to achieve classification performance comparable or superior to like mass spectroscopy and sensor-based systems. Second, using 158 collected samples (62 NSCLC subjects and 96 controls), the accuracy range for the VOC-based model was 65.19%–85.44% (51.61%–66.13% sensitivity and 73.96%–97.92% specificity), depending on the employed cross-validation technique. The model based on breathprint predictors generally performed better, with accuracy ranging from 71.52%–86.08% (58.06%–82.26% sensitivity and 80.21%–88.54% specificity). Lastly, using a protocol based on consensus feature selection, three VOCs (isopropanol, dimethyl sulfide, and butyric acid) and two breathprint features (from a local binary pattern transformation of the spectra) were identified as possible NSCLC biomarkers. This research demonstrates the potential of infrared CRDS breath profiles and the developed early-stage classification techniques for lung cancer biomarker detection and screening.
2D Cu2−

x
Se@graphene multifunctional interlayer boosting polysulfide rapid conversion and uniform Li2S nucleation for high performance Li–S batteries
Authors: Yuan Meng , Shi Haodong , Dong Cong , Zheng Shuanghao , Wang Kai , Wang Shaoxu , Wu Zhong-Shuai 
Published: March 2022

Abstract
Some vital challenges are main obstacles for further development of lithium–sulfur (Li–S) batteries such as low capacity and poor cycle stability resulted from polysulfide shuttling behavior, the physical/chemical entrapment is regarded as an effective method to inhibit and catalyze polysulfides. Herein we design a cross-linked framework of reduced graphene oxide anchored with Cu2−x
Se nanoparticles (Cu2−x
Se@rGO) by building an electrolyte/Cu2−x
Se/graphene triple-phase interface to be a high-efficiency electrocatalyst for Li–S batteries. Importantly, this three-dimensional conductive network possesses a large specific surface area with high ion transport capability, meanwhile providing strong physical constraint for efficient adsorption of soluble polysulfides. Further, this triple-phase catalytic interface provides strong chemical adsorption and abundant Cu2−x
Se nanoparticle sulfiphilic active sites, effectively inhibiting the dissolution of polysulfides and guaranteeing the efficient polysulfide adsorption catalysis as well as rapidly uniform Li2S nucleation. Consequently, with the Cu2−x
Se@rGO separator, a lower capacity decay rate about 0.059% per cycle after 500 cycles at 2 C is obtained. What’s more, with a higher areal sulfur loading of 3.0 mg cm−2, the capacity is still maintained at 805 mAh g−1 over 100 cycles. Therefore, this work will open new avenue to construct 2D transition metal selenide for superior performance Li–S batteries.
Assessing the effect of calcination on adsorption capability of Mg/Al layer double hydroxides (LDHs)
Authors: Wiyantoko Bayu , Kurniawati Puji , Purbaningtias Tri Esti , Jauhari Muhammad Husnu , Yahya Amri , Tamyiz Muchammad , Fatimah Is , Doong Ruey-an 
Published: March 2022

Abstract
The present study was carried out to prepare and characterize calcined Mg/Al layer double hydroxides (LDHs) used in the adsorption of methyl orange in an aqueous solution as an anionic dye in a batch system. Synthesis of LDHs using coprecipitation method with Mg/Al ratio of 3:1 and obtained material was treated by hydrothermal treatment for 4 h in 400 °C. The result showed that hydrothermal treatment on the synthesis of Mg/Al LDHs yielded the formation of mixed metal oxide from magnesium oxide and aluminum oxide on calcined LDHs were shown on a wide diffraction pattern, while infrared spectrum showed that NO3
− and CO3
2− as balancing anions disappeared after calcination process. The optimum condition for calcined layer double hydroxides (CLDH) and LDHs were in pH 4 (40.61 mg g−1) and pH 3 (36.29 mg g−1) for methyl orange adsorption. The equilibrium time for CLDH and LDHs respectively were 3 h and 5 h where the initial time started rapidly. The kinetic study described pseudo-second-order fitted for methyl orange adsorption with R2 = 0.9998 and 0.9996 for CLDH and LDH. The best isotherm was shown by Freundlich model with R2 = 0.9957 and 0.9721 for CLDH and LDH and. The results suggested that calcined LDHs were efficient adsorbents for methyl orange remediation of relatively high concentrations.
Development of a combined interferometer using millimeter wave solid state source and a far infrared laser on ENN’s XuanLong-50 (EXL-50)
Authors: XIE Jiaxing , WEI Xuechao , LIU Haiqing , LI Songjian , ZHANG Jibo , YAO Yuan , WANG Yunfei , JIE Yinxian 
Published: March 2022

Abstract
A millimeter wave solid state source—far infrared laser combined interferometer system (MFCI) consisting of a three-channel 890 GHz hydrogen cyanide (HCN) laser interferometer and a three-channel 340 GHz solid state source interferometer (SSI) is developed for real-time line-integrated electron density feedback and electron density profile of the EXL-50 spherical tokamak device. The interferometer system is a Mach–Zehnder type, with all probe-channels measured vertically, covering the plasma magnetic axis to the outermost closed magnetic plane. The HCN laser interferometer uses an HCN laser with a frequency of 890 GHz as a light source and modulates a 100 kHz beat signal by a rotating grating, giving a temporal resolution of 10 μs. The SSI uses two independent 340 GHz solid-state diode sources as the light source, the frequency of the two sources is adjustable, and the temporal resolution of SSI can reach 1 μs by setting the frequency difference of the two lasers at 1 MHz. The main optical path of the two interferometers is compactly installed on a set of double-layer optical platform directly below EXL-50. Dual optical path design using corner cube reflectors avoids the large support structures. Collinear the probe-beams of two wavelengths, then the phase error caused by vibration can be compensated. At present, the phase noise of the HCN Interferometer is 0.08 rad, corresponding to a line-integrated electron density of 0.88 × 1017 m−2, one channel of measuring result was obtained by the MFCI system, and the highest density measured is about 0.7 × 1019 m−2.