Article
Physics, Multidisciplinary
Dongliang Gong, Ming Yi, Meng Wang, Tao Xie, Wenliang Zhang, Sergey Danilkin, Guochu Deng, Xinzhi Liu, Jitae T. Park, Kazuhiko Ikeuchi, Kazuya Kamazawa, Sung-Kwan Mo, Makoto Hashimoto, Donghui Lu, Rui Zhang, Pengcheng Dai, Robert J. Birgeneau, Shiliang Li, Huiqian Luo
Summary: This study presents a comprehensive investigation on the nematic fluctuations in a non-superconducting iron pnictide system, revealing the crucial role of the interplay between local spins and itinerant electrons on Fermi surfaces. The results indicate that the in-plane resistivity anisotropy highly depends on the Cr dopings and the type of charge carriers, and the orbital degree of freedom may behave differently from the spin degree of freedom.
FRONTIERS IN PHYSICS
(2022)
Article
Multidisciplinary Sciences
Matthias S. Ikeda, Thanapat Worasaran, Elliott W. Rosenberg, Johanna C. Palmstrom, Steven A. Kivelson, Ian R. Fisher
Summary: The elastocaloric effect (ECE) measures changes in entropy related to strain experienced by a material, providing valuable information about the entropy landscape near strain-tuned phase transitions. By combining ECE measurements with elastoresistivity measurements, a direct comparison of thermodynamic and transport properties can be made, revealing unexpected relationships between doping dependence and scattering intensity of low-energy quasi-particles by nematic fluctuations.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Physics, Applied
Xinhui Zhan, Xiaolei Yi, Xiangzhuo Xing, Meng Li, Linchao Yu, Song Huang, Jiajia Feng, Yan Meng, Nan Zhou, Xiaobing Liu, Zhixiang Shi
Summary: By synthesizing EuFe1-xPdxAs2 samples, the effect of doping on superconductivity and magnetism was studied. The results show that Pd doping suppresses the Fe-related spin density wave transition and induces superconductivity, while the Eu-related antiferromagnetic order is minimally affected.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Xiaochen Hong, Steffen Sykora, Federico Caglieris, Mahdi Behnami, Igor Morozov, Saicharan Aswartham, Vadim Grinenko, Kunihiro Kihou, Chul-Ho Lee, Bernd Buechner, Christian Hess
Summary: A systematic elastoresistance study of isovalent- and electron-doped KFe2As2 crystals revealed divergent elastoresistance along their [110] direction upon cooling. The increased nematicity could be associated with another electronic criticality.
FRONTIERS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
M. H. Tang, C. H. Dong, Z. T. Xu, C. Liu, P. Yang, C. Tu, W. W. Guo, Y. C. Zhu, C. Yao, H. Huang, D. L. Wang, X. P. Zhang, Y. W. Ma
Summary: In this paper, a comparative investigation on the differences of vortex dynamics in Ba(Fe0.94Co0.06)2As2 single crystal, grain oriented polycrystal, and random oriented powder is conducted. It is found that the introduction of strong pins in the polycrystal effectively reduces the magnetization relaxation rates in the low magnetic field regime.
MATERIALS TODAY PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Ya-Bin Liu, Yi Liu, Yan-Wei Cui, Si-Qi Wu, Zhi Ren, Guang-Han Cao
Summary: This study investigates the effects of Ni doping on the magnetism and superconductivity in the Eu-containing 112-type system Eu(Fe1-xNix)As-2. The results show that Ni doping suppresses the spin-density wave order and induces superconductivity within a certain range, indicating a weak coupling between superconductivity and Eu spins.
Article
Multidisciplinary Sciences
Dushyant M. Narayan, Peipei Hao, Rafal Kurleto, Bryan S. Berggren, A. Garrison Linn, Christopher Eckberg, Prathum Saraf, John Collini, Peter Zavalij, Makoto Hashimoto, Donghui Lu, Rafael M. Fernandes, Johnpierre Paglione, Daniel S. Dessau
Summary: The study investigates the superconductivity of Ba1-xSrxNi2As2 series and finds that isovalent substitution weakens the charge and nematic orders but enhances the superconducting transition temperature. The analysis reveals the presence of reasonably nested electron and hole Fermi pockets with Ni d(xz)/d(yz) orbital compositions within the optimal substitution range, which are associated with the enhancement of nematic fluctuations.
Article
Physics, Applied
Abhisek Bag, Saptarshi Mandal
Summary: We study a Cooper pair beam splitter in an iron-pnictide superconductor and calculate the entangled electron-hole current. The interplay of various physical parameters such as doping, nesting, and magnetic ordering affects the resultant current. The non-monotonous and oscillatory nature of the beam splitter current is a manifestation of interference effects. Our findings have potential applications in experimental determination of coexistence phase and in realizing quantum gates or switches.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2023)
Article
Materials Science, Multidisciplinary
H. Pfau, M. Yi, M. Hashimoto, T. Chen, P-C Dai, Z-X Shen, S-K Mo, D. Lu
Summary: The study investigates the influence of electronic nematicity on quasiparticle coherence in detwinned FeSe using ARPES, finding an anisotropy between dxz and dyz orbitals and a more coherent dxz orbital compared to the dyz orbital. This observation contrasts with earlier predictions and underscores the importance of electronic correlations in describing nematicity.
Article
Physics, Multidisciplinary
Finn Lasse Buessen, Sopheak Sorn, Ivar Martin, Arun Paramekanti
Summary: The interplay between nematicity and superconductivity in quantum materials was investigated by simulating a 2D array of nematogens coupled to Josephson junction wires, revealing that superconductivity can promote nematic ordering. The study discussed the implications of these findings in 2D electron gases and doped topological insulators.
Article
Physics, Applied
I. F. Llovo, D. Sonora, J. Mosqueira, S. Salem-Sugui, Shyam Sundar, A. D. Alvarenga, T. Xie, C. Liu, S-L Li, H-Q Luo
Summary: The study reports detailed magnetic relaxation and isothermal magnetization measurements in the vortex state of the 112-type iron-pnictide superconductor Ca0.82La0.18Fe0.96Ni0.04As2 with T-c of about 22 K. A well defined second magnetization peak (SMP) feature is observed below T-c for measurements with H parallel to c-axis, while the feature is suppressed at low temperatures when H is parallel to ab-planes. Rigorous analysis suggests an elastic to plastic pinning crossover across H-p, accompanied by a possible phase transition in vortex lattice near H-p. The dominant sources of pinning are likely point disorder and surface defects, contributing to delta l-type pinning in the sample, with a high J(c) exceeding 10(5) A cm(-2) observed.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
A. B. Yu, Z. Huang, C. Zhang, Y. F. Wu, T. Wang, T. Xie, C. Liu, H. Li, W. Peng, H. Q. Luo, G. Mu, H. Xiao, L. X. You, T. Hu
Summary: The study experimentally investigated the vortex pinning in two bilayer FeSCs, CaKFe4As4(Fe1144) and KCa2Fe4As4F2(Fe12442), revealing a higher flux pinning energy in Fe1144. By combining data from other FeSCs, an anti-correlation was found between the pinning energy and superconducting anisotropy in these materials, indicating the importance of interlayer interaction when considering vortex pinning in FeSCs.
Article
Chemistry, Physical
M. F. Hansen, J. -B. Vaney, P. De Rango, M. Salaun, S. Tence, V. Nassif, P. Toulemonde
Summary: In this study, the topotactical deuteration of LaFeSi into superconducting LaFeSi(H,D) was investigated using in-situ neutron powder diffraction. The thermodynamic nature of the chemical process was studied through thermogravimetric analysis, differential thermal analysis, and mass spectroscopy. Pressure-composition-isotherm measurements revealed a remarkably low equilibrium pressure. The reaction enthalpy was determined to be Delta H = -54.5 kJ/mol. The obtained LaFeSi(H,D) samples exhibited a significant change in thermal expansion anisotropy, and all showed superconductivity with a transition temperature of -10 K.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Multidisciplinary
Yuan-Fang Yue, Zhong-Bing Huang, Huan Li, Xing Ming, Xiao-Jun Zheng
Summary: In this study, the competition between different magnetic structures in hole-doped Fe-pnicitides was explored using an extended five-orbital Hubbard model with long-range Coulomb interactions. The findings indicate that the stabilized magnetic structure changes with increasing hole doping level. The magnetic competition induced by hole doping may explain the decrease in the Neel temperature TN and the suppressed magnetic moment in hole-doped Fe-pnicitides.
Additionally, the sign reversal of the kinetic energy anisotropy as the magnetic ground state evolves may explain the puzzling sign reversal of the in-plane resistivity anisotropy in hole-doped Fe-pnicitides.
Article
Physics, Multidisciplinary
Yu Dong, Yangyang Lv, Zuyu Xu, M. Abdel-Hafiez, A. N. Vasiliev, Haipeng Zhu, Junfeng Wang, Liang Li, Wanghao Tian, Wei Chen, Song Bao, Jinghui Wang, Yueshen Wu, Yulong Huang, Shiliang Li, Jie Yuan, Kui Jin, Labao Zhang, Huabing Wang, Shun-Li Yu, Jinsheng Wen, Jian-Xin Li, Jun Li, Peiheng Wu
Summary: The discovery of (pi, pi) nematic superconducting order in iron-based superconductors suggests it is a universal feature that needs to be taken into account in the superconducting pairing mechanism.
CHINESE PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Alexei A. Belik, Ran Liu, Kazunari Yamaura
Summary: Sm2MnZnMn4-xTixO12 perovskites with different Mn contents were synthesized, and it was found that Zn doping significantly modified the magnetic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Gufei Zhang, Ramiz Zulkharnay, Xiaoxing Ke, Meiyong Liao, Liwang Liu, Yujie Guo, Yejun Li, Horst-Guenter Rubahn, Victor V. Moshchalkov, Paul W. May
Summary: By investigating electrical transport phenomena, it is found that diamond nanorings (DNRs) transform into bosonic semiconductors upon the formation of Cooper pairs, exhibiting a sharp resistance increase and a giant negative magnetoresistance. In contrast, diamond half-loops (DHLs) undergo a metal-superconductor transition. This finding reveals the potential use of DNRs in manipulating Cooper pairs in superconducting quantum devices.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Yong Li, Jun Li, Shanshan Miao, Huaixin Yang, Jianqi Li, Chang-Jong Kang, Youguo Shi, Hai L. Feng
Summary: The study explores metallic polar oxides by designing a single-layer Aurivillius oxide Bi2ReO6. Synthesized by high-pressure methods, Bi2ReO6 exhibits a tetragonal structure with the polar space group P4(2) cm (No.101), consisting of (Bi2O2)(2+) layers and perovskite-like [ReO4](2-) layers. The results indicate that Bi2ReO6 is a Pauli metal due to its magnetic and electrical properties, and the calculated electronic structures reveal the contribution of Re 5d orbitals hybridized with O 2p orbitals to the metallic nature at the Fermi level.
CHEMISTRY OF MATERIALS
(2023)
Article
Physics, Condensed Matter
Jing-Jing Xiao, Cui-Xiang Wang, Da-Yu Yan, Yong Li, Hai L. Feng, Lai-Jun Liu, You-Guo Shi
Summary: Single crystals of LnRu(2)Ga(8) and LnCo(2)Al(8) (Ln = La and Pr) were grown using a Ga/Al self-flux method. The orthorhombic CaCo2Al8-type structure with space group Pbam (No.55) was identified by x-ray diffraction. LaRu2Ga8 and LaCo2Al8 are Pauli paramagnetic down to 2 K, while PrRu2Ga8 and PrCo2Al8 show antiferromagnetic (AFM) order at 2.5 and 5 K, respectively. Strong magnetic anisotropy in PrRu2Ga8 and PrCo2Al8 single crystals was observed, with field-induced FM state for H||c and robust AFM state for H perpendicular to c.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Chemistry, Multidisciplinary
Leilei Chen, Rong Huang, Xiaoxing Ke, Jin Yu, Tiantian Zhang, Jean-Luc Maurice, Jiheng Li, Kai Li, Lifeng Ni, Shuzhao Huang, Tiezhen Ren, Zhanbing He
Summary: A facile method for preparing vertically aligned and parallel growth of aluminum-cobalt oxide nanosheet arrays is reported. The parallel growth is attributed to lattice-matching among the nanosheets, buffer layer, and substrate, which is confirmed by transmission electron microscopy. Furthermore, the aluminum-cobalt oxide nanosheets exhibit high-temperature ferromagnetism, indicating potential applications in high-temperature ferromagnetic fields.
Article
Chemistry, Physical
Alexei A. Belik, Ran Liu, Andreas Donni, Masahiko Tanaka, Kazunari Yamaura
Summary: In this work, perovskite solid solutions (Lu0.5Mn0.5)(Mn1-xTix)O-3 were synthesized and their crystal structure was determined by Rietveld analysis of X-ray powder diffraction data. It was found that the x=0.25 and 0.50 samples exhibit long-range ferrimagnetic order below their respective transition temperatures Tc=89K and 36K, despite the presence of non-magnetic Ti4+ ions diluting the A and B sublattices. The x=0.75 sample shows a spin-glass transition at Ts=6K. Temperature-independent dielectric constants were observed for the x=0.50 and x=0.75 samples.
Article
Nanoscience & Nanotechnology
Huawei Wang, Jialong Gao, Changli Chen, Wei Zhao, Zihou Zhang, Dong Li, Ying Chen, Chenyue Wang, Cheng Zhu, Xiaoxing Ke, Jiajing Pei, Juncai Dong, Qi Chen, Haibo Jin, Maorong Chai, Yujing Li
Summary: This work demonstrates a hybrid electrocatalyst composed of PtNi-W alloy nanocrystals loaded on carbon surface with atomically dispersed W sites. The presence of single-atomic W on the carbon surface can create protonic acid sites and establish an extended proton transport network at the catalyst surface. When used as a cathode in a membrane electrode assembly with ultra-low loading of 0.05 mg(Pt) cm(-2), the peak power density of the fuel cell is increased by 64.4% compared to commercial Pt/C catalyst. Theoretical calculations indicate that the single-atomic W possesses favorable energetics for *OOH formation, allowing efficient conversion of intermediates and promoting interfacial cascade catalysis. This work highlights a novel functional hybrid electrocatalyst design from the atomic level, addressing the bottleneck issues at the device level.
NANO-MICRO LETTERS
(2023)
Article
Physics, Particles & Fields
Da-Chuan Lu, Zhengdi Sun
Summary: In this study, we analyzed the triality fusion category discovered in the c = 1 Kosterlitz-Thouless theory using group theoretical fusion category tools. We computed the simple lines, fusion rules, and F-symbols, and studied the physical implications of this fusion category, including spin selection rule derivation, computation of asymptotic density of states for irreducible representations, and analysis of its anomaly and constraints under renormalization group flow. We also compared our findings with another set of F-symbols for fusion categories with the same fusion rule, highlighting the differences in spin selection rules and providing a comprehensive list of fusion categories with the same fusion rule based on the classification result.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Shuo Wu, Xiaolong Xu, Zelin Wang, Xiaoxing Ke, Shaonan Gu, Guowei Zhou, Lianzhou Wang
Summary: In this study, we propose an engineering strategy to fabricate high Co atomic loading Co-N-4-C single-atom catalysts (SACs) based on the biomineralization of yeast cells. The optimized sample showed a Co atomic loading of 12.18 wt % and a specific surface area of 403.26 m(2) g(-1). It exhibited excellent electrocatalytic kinetics and a high discharge voltage of 1.08V at 10 mA cm(-2) for more than 100 h in Zn-air batteries.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Guowei Wang, Manchen Zhang, Guikai Zhang, Zelin Wang, Xu Chen, Xiaoxing Ke, Changhao Wang, Shengqi Chu, Manling Sui
Summary: This study proposes an innovative approach to synthesize dual-atomic-site alloy (DASA) through two-step pyrolysis, avoiding the challenges of sintering and alloying on metal hosts. The approach is demonstrated by synthesizing Ir1Ni1@Co/N-C DASA, which exhibits outstanding bifunctional oxygen reduction/evolution reaction (ORR/OER) performance in both acidic and alkaline media. The density functional theory (DFT) calculations further reveal the regulation of adsorption-free energies of intermediates by Ir1 and Ni1 on Co.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Xun Kang, Ryuta Ishikawa, Alexei A. Belik, Yoshihiro Tsujimoto, Masao Arai, Satoshi Kawata, Kazunari Yamaura
Summary: In this study, the double perovskite oxide Cd2FeReO6 was successfully synthesized, showing remarkable low-field butterfly type tunneling magnetoresistance behavior at high temperature. First-principles calculations revealed its half-metallic ferrimagnetic nature.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Robert D. Smyth, Dmitry Khalyavin, Yoshihiro Tsujimoto, Kazunari Yamaura, Simon J. Clarke
Summary: The full characterisation of the high-pressure-synthesised, metastable layered oxyhalide Sr2NiO2Cl2 is reported, unveiling its unique crystal structure and magnetic properties.
SOLID STATE SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Hao-Zhe Xu, Dong Li, Ying Chen, Pin Fang, Xiao-Xing Ke, Olga Demidenko, Yu-Jing Li
Summary: Tungsten oxide (WO3) has attracted attention for its electrochemical stability and proton absorption/desorption capability. In this study, a PtCuNi/WO3/C hybrid catalyst with an inter-diffusive alloy/WO3 interface on carbon was prepared. The catalyst exhibits enhanced activity and stability associated with the WO3 content, which is due to the complementary proton supply of non-stoichiometric HxWO3 and the prevention of particle dissolution and detachment by WO3.
Article
Chemistry, Multidisciplinary
Min Wang, Ling Lin, Zhangyi Zheng, Zhenyang Jiao, Wei Hua, Guowei Wang, Xiaoxing Ke, Yuebin Lian, Fenglei Lyu, Jun Zhong, Zhao Deng, Yang Peng
Summary: An integral gas diffusion electrode (NiNF) with hierarchical porosity was fabricated through electrospinning, addressing the issues of delamination, flooding, salt precipitation, and limited utilization of active sites. The GDE, with a hydrophobic superficial layer, works in a broad pH range and achieves near-unity faradaic efficiency of CO with high peak current densities in both alkaline and acidic flow cells. This work shows the potential of industrial-scale CO2 electrolysis through GDE design innovation.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Da-Chuan Lu, Meng Zeng, Juven Wang, Yi-Zhuang You
Summary: Symmetric mass generation (SMG) is a mechanism that introduces a mass gap for gapless fermions through nonperturbative interactions without producing any fermion bilinear condensation. This paper extends the concept of SMG to Fermi liquids with a finite Fermi volume and explores the possibility of closing the Fermi surfaces through interactions without breaking the U(1) loop group symmetry or developing topological orders. Examples of Fermi surface SMG in (1+1)-dimensional and (2+1)-dimensional Fermi liquid systems are provided. A side product of this model is the pristine lattice regularization for the (1+1)D U(1) symmetric chiral fermion model, which enables efficient numerical simulations of chiral fermions in their own dimensions.