Article
Multidisciplinary Sciences
Eric Wahlberg, Riccardo Arpaia, Gotz Seibold, Matteo Rossi, Roberto Fumagalli, Edoardo Trabaldo, Nicholas B. Brookes, Lucio Braicovich, Sergio Caprara, Ulf Gran, Giacomo Ghiringhelli, Thilo Bauch, Floriana Lombardi
Summary: The study showed that in highly strained, ultra-thin, underdoped YBa2Cu3O7-delta films, the T-linear resistivity is restored when the CDW amplitude is suppressed, indicating an intimate connection between the onset of CDWs and the departure from T-linear resistivity in underdoped cuprates.
Article
Multidisciplinary Sciences
D. H. Nguyen, A. Sidorenko, M. Taupin, G. Knebel, G. Lapertot, E. Schuberth, S. Paschen
Summary: The discovery of unconventional superconductivity in the strange metal YbRh2Si2 and the proposal of a possible pairing mechanism sheds light on understanding the mechanism of unconventional superconductivity.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
Rong Li, Zhen-Su She
Summary: The study proposes that the strange metal phase is a novel emergent mesoscopic quantum state, beyond Landau's quasiparticle excitation, composed of fluctuating vortices. The model successfully predicts the local magnetic field and scattering rate, explaining the quantum mechanism of Planckian dissipation.
NEW JOURNAL OF PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Darshana Wickramaratne, Menashe Haim, Maxim Khodas, I. I. Mazin
Summary: Hybrid Ising superconductor-ferromagnetic insulator heterostructures offer a unique opportunity to explore the interplay between proximity-induced magnetism, spin-orbit coupling, and superconductivity, leading to a comprehensive explanation of complex effects such as an increase in superconducting gap magnitude, broadening of tunneling peaks, hysteretic behavior in tunneling conductance, and nematic symmetry breaking in the superconducting state. These effects are primarily attributed to the interplay between proximity-induced exchange splitting and intrinsic defects.
Article
Astronomy & Astrophysics
Ankur Srivastav, Sunandan Gangopadhyay
Summary: We have extended our previous work on rotating holographic superfluids to include Lifshitz scaling, which breaks relativistic invariance and indicates the existence of a Lifshitz fixed point. We analytically showed that we still obtain the same vortex solutions as before. However, for z ≠ 1, our study revealed surprising results regarding dissipation in the holographic superfluid, showing that higher winding number vortices increase with higher imaginary chemical potential in the open interval (1, 2).
Article
Nanoscience & Nanotechnology
Joung Eun Yoo, Ju Young Sung, Jin Ha Hwang, Inhee Maeng, Seung-Jae Oh, Inho Lee, Ji Hoon Shim, Sung Dug Kim, Du-Seop Yoon, Seo Young Jang, Young Jae Kang, Sang Woon Lee
Summary: Metal thin films such as Cu and TiN exhibit a substantial increase in resistivity as they become thinner, while MAX-phase V2AlC films show a weaker dependence on thickness. This is due to the highly ordered crystalline quality and small electron mean free path of V2AlC films, making them a promising option to overcome scaling limitations in semiconductor devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
E. Mauri, H. T. C. Stoof
Summary: This study investigates the Coulomb drag between two strange-metal layers using the Einstein-Maxwell-Dilaton model from holography. It reveals that the low-temperature dependence of the drag resistivity is proportional to T4, which deviates significantly from the quadratic dependence of Fermi liquids. Numerical results at room temperature using typical parameters of cuprates show an enhancement of drag resistivity due to the plasmons characteristic of the two-layer system.
Article
Multidisciplinary Sciences
Victor G. Yarzhemsky, Egor A. Teplyakov
Summary: The superconducting order parameter (SOP) of triplet superconductor UTe2 was constructed using the topological space group approach, which differs from phenomenological and topological approaches by treating single pair function and phase winding in condensate as separate quantities. By studying the connection for the D2h point group and m & PRIME; m & PRIME; m magnetic group, it was demonstrated how a non-unitary pair function of UTe2 can be constructed using one-dimensional real irreducible representations and Ginzburg-Landau phase winding. Experimental data on the superconducting order parameter of topological superconductors UPt3, Sr2RuO4, LaPt3P, and UTe2 were examined, and the peculiarities of their nodal structures were found to be connected to the theoretical results of the topological space group approach.
Article
Materials Science, Multidisciplinary
Z. X. Wang, Q. Wu, Q. W. Yin, C. S. Gong, Z. J. Tu, T. Lin, Q. M. Liu, L. Y. Shi, S. J. Zhang, D. Wu, H. C. Lei, T. Dong, N. L. Wang
Summary: Recent research on the kagome lattice metal AV(3)Sb(5) (A = K, Rb, Cs) family indicates the coexistence of superconductivity, charge density wave (CDW), and peculiar properties arising from a topological nontrivial electronic structure. The results suggest that the CDW order in this family is very different from a conventional CDW condensate, with the excited quasiparticle relaxation dynamics explained by the formation of a temperature-dependent energy gap below the phase transition.
Article
Multidisciplinary Sciences
Liam S. Farrar, Zachary Zajicek, Archie B. Morfoot, Matthew Bristow, Oliver S. Humphries, Amir A. Haghighirad, Alix McCollam, Simon J. Bending, Amalia I. Coldea
Summary: The magnetotransport behavior of FeSe in the nematic phase shows unusual multiband effects, challenging the simple two-band approximation. By reducing the thickness of exfoliated flakes of FeSe, the electronic properties were investigated. The results reveal the localization of negative charge carriers and the presence of hole-like quasiparticles with a lighter effective mass.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Multidisciplinary Sciences
Victor G. Yarzhemsky
Summary: Experimental data on Sr2RuO4 and Fe-pnictide superconductors show potential presence of odd and even Cooper pairs, suggesting the need for further investigation on their superconducting properties.
Article
Physics, Applied
E. F. Talantsev
Summary: Recent research has found superconductivity in highly compressed carbonaceous sulfur hydrides with a critical temperature of 190 K. The properties of this material are similar to those of H3S, suggesting that it falls into the category of unconventional superconductors. Further independent experimental confirmation is needed to verify the high critical temperature values reported by Snider et al.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
Xingyu Jiang, Mingyang Qin, Xinjian Wei, Li Xu, Jiezun Ke, Haipeng Zhu, Ruozhou Zhang, Zhanyi Zhao, Qimei Liang, Zhongxu Wei, Zefeng Lin, Zhongpei Feng, Fucong Chen, Peiyu Xiong, Jie Yuan, Beiyi Zhu, Yangmu Li, Chuanying Xi, Zhaosheng Wang, Ming Yang, Junfeng Wang, Tao Xiang, Jiangping Hu, Kun Jiang, Qihong Chen, Kui Jin, Zhongxian Zhao
Summary: Superconductivity is related to the strange-metal state, and the resistivity in the strange metal significantly depends on the superconducting transition temperature. Unconventional superconductors usually exhibit a linear temperature dependence of resistivity (T-linear) in the low-temperature limit. The understanding of the relationship between the strange metal and superconductivity is crucial for further theoretical development, but comprehensive studies are lacking due to the difficulty in controlling the superconducting state. In this study, a typical strange-metal behavior, T-linear resistivity, linear-in-field magnetoresistance, and universal scaling of magnetoresistance, is observed in FeSe. The relationship between the T-linear resistivity coefficient and the critical temperature suggests a universal mechanism underlying T-linear resistivity and unconventional superconductivity.
Article
Multidisciplinary Sciences
Shu Cai, Jinyu Zhao, Ni Ni, Jing Guo, Run Yang, Pengyu Wang, Jinyu Han, Sijin Long, Yazhou Zhou, Qi Wu, Xianggang Qiu, Tao Xiang, Robert J. Cava, Liling Sun
Summary: Here we report the first observation of the concurrent breakdown of the strange metal (SM) normal state and superconductivity at a pressure-induced quantum critical point in Ca-10(Pt4As8)((Fe0.97Pt0.03)(2)As-2)(5) superconductor. The study found that, upon suppressing the superconducting state, the power exponent (alpha) changes from 1 to 2, and the slope of the temperature-linear resistivity per FeAs layer (A(square)) gradually diminishes. At a critical pressure, A(square) and superconducting transition temperature (T-c) go to zero concurrently, indicating a quantum phase transition from a superconducting state with a SM normal state to a non-superconducting Fermi liquid state. Scaling analysis shows that the change of A(square) with T-c follows the relation of T-c similar to (A(square))(0.5), similar to what is seen in other chemically doped unconventional superconductors. These results suggest a simple but powerful organizational principle connecting the SM normal state with high-T-c superconductivity.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
K. Uchida, G. Mattoni, S. Yonezawa, F. Nakamura, Y. Maeno, K. Tanaka
Summary: Competition and cooperation among orders play a crucial role in the physical properties of strongly correlated materials. This study investigates the impact of many-body physics on extreme nonlinear optical phenomena, focusing on high-order harmonic generation from the Mott-insulating phase of Ca2RuO4. The results show a significant enhancement of harmonic generation at low temperatures, which can be explained by a scaling law dependent on the material's gap energy and photon emission energy. These findings suggest that the highly nonlinear optical response in strongly correlated materials is influenced by the competition among multiple degrees of freedom and electron-electron correlations.
PHYSICAL REVIEW LETTERS
(2022)
Review
Multidisciplinary Sciences
Kun Jiang, Tao Wu, Jia-Xin Yin, Zhenyu Wang, M. Zahid Hasan, Stephen D. Wilson, Xianhui Chen, Jiangping Hu
Summary: This review discusses the recent progress on the experimental and theoretical studies of kagome superconductors AV(3)Sb(5), including the electronic properties, charge density wave state, time-reversal symmetry breaking, and superconducting properties. The authors aim to stimulate an expanded search for unconventional kagome superconductors.
NATIONAL SCIENCE REVIEW
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Yang Chen, Xuewen Hou, Yifeng Yang, Qianqian Ge, Yan Zhou, Shengdong Nie
Summary: This study proposes a novel lung nodule detection model with high detection sensitivity and low false-positive rate, which shows potential for clinical application.
JOURNAL OF DIGITAL IMAGING
(2023)
Review
Physics, Condensed Matter
Yi-feng Yang
Summary: Recent advances in experimental techniques have provided new insights into heavy fermion physics. This article summarizes the author's research in this area, specifically focusing on five major topics: development of phase coherence and two-stage hybridization, two-fluid behavior and hidden universal scaling, quantum phase transitions and fractionalized heavy fermion liquid, quantum critical superconductivity, and material-specific properties. These findings go beyond conventional mean-field or local approximation-based theories, leading to an emerging global picture of heavy fermion physics.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Physics, Multidisciplinary
Xingyu Jiang, Mingyang Qin, Xinjian Wei, Li Xu, Jiezun Ke, Haipeng Zhu, Ruozhou Zhang, Zhanyi Zhao, Qimei Liang, Zhongxu Wei, Zefeng Lin, Zhongpei Feng, Fucong Chen, Peiyu Xiong, Jie Yuan, Beiyi Zhu, Yangmu Li, Chuanying Xi, Zhaosheng Wang, Ming Yang, Junfeng Wang, Tao Xiang, Jiangping Hu, Kun Jiang, Qihong Chen, Kui Jin, Zhongxian Zhao
Summary: Superconductivity is related to the strange-metal state, and the resistivity in the strange metal significantly depends on the superconducting transition temperature. Unconventional superconductors usually exhibit a linear temperature dependence of resistivity (T-linear) in the low-temperature limit. The understanding of the relationship between the strange metal and superconductivity is crucial for further theoretical development, but comprehensive studies are lacking due to the difficulty in controlling the superconducting state. In this study, a typical strange-metal behavior, T-linear resistivity, linear-in-field magnetoresistance, and universal scaling of magnetoresistance, is observed in FeSe. The relationship between the T-linear resistivity coefficient and the critical temperature suggests a universal mechanism underlying T-linear resistivity and unconventional superconductivity.
Article
Engineering, Industrial
Xiaoyu Yang, Liyang Xie, Yifeng Yang, Bingfeng Zhao, Yuan Li
Summary: The Weibull distribution is widely used for reliability analysis. This paper presents a simple method called the minimum discrepancy method for parameter estimation of the Weibull distribution using both complete and censored data. The study also compares thirteen methods using several criteria in a small sample size. The results recommend the generalized least square 1, the weighted least square 1, the weighted maximum likelihood estimation, and the minimum discrepancy method for parameter estimation with small samples.
QUALITY ENGINEERING
(2023)
Article
Geriatrics & Gerontology
Zhaoshun Jiang, Yuxi Cai, Songbin Liu, Pei Ye, Yifeng Yang, Guangwu Lin, Shihong Li, Yan Xu, Yangjing Zheng, Zhijun Bao, Shengdong Nie, Weidong Gu
Summary: Using machine-learning algorithms, we identified abnormal functional connectivity patterns in the default mode network (DMN) of patients with delayed neurocognitive recovery (DNR), particularly in regions involved in visual processing, suggesting that these changes could serve as potential biomarkers for predicting DNR.
FRONTIERS IN AGING NEUROSCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Yipeng An, Juncai Chen, Zhengxuan Wang, Jie Li, Shijing Gong, Chunlan Ma, Tianxing Wang, Zhaoyong Jiao, Ruqian Wu, Jiangping Hu, Wuming Liu
Summary: In this study, a new kagome magnesium triboride (MgB3) superconductor is predicted, with a calculated critical temperature of about 12.2 K and 15.4 K under external stress, which is potentially the highest among the reported diverse kagome-type superconductors. Various exotic physical properties of the system, including van Hove singularity, flat-band, multiple Dirac points, and nontrivial topology, are revealed. The topological and nodal superconducting nature of MgB3 is unveiled using a recently developed symmetry indicators method. This study suggests that MgB3 can serve as a new platform to explore exotic physics in the kagome structure and search for more superconductors and topological materials with XY3-type kagome lattice.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ying Zhou, Long Chen, Yuxin Wang, Jinfeng Zhu, Zhongnan Guo, Chen Liu, Zhiying Guo, ChinWei Wang, Han Zhang, Yulong Wang, Ke Liao, Youting Song, Jia-ou Wang, Dongliang Chen, Jie Ma, Jiangping Hu, Gang Wang
Summary: A new series of compounds, ANi5Bi5.6+delta (where A = K, Rb, and Cs), have been discovered with a quasi-one-dimensional (Q1D) [Ni5Bi5.6+delta]- double-walled column and a coaxial inner one-dimensional Bi atomic chain. The compounds exhibit metallic behaviors with strong electron correlation, and the Sommerfeld coefficient is enhanced with the increasing cationic radius. The substitution of Ni for Mn in ANi5Bi5.6+delta results in enhanced intercolumn distances and strong diamagnetic susceptibilities.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Zhaoying Dang, Feng Guo, Huan Duan, Qiyue Zhao, Yuxiang Fu, Wenjing Jie, Kui Jin, Jianhua Hao
Summary: In this study, ferroelectric-tuned synaptic transistors were designed by integrating 2D black phosphorus with a flexible ferroelectric copolymer. These transistors exhibited high mobility, low energy consumption, and reliable synaptic behaviors, such as paired-pulse facilitation and long-term depression/potentiation. Furthermore, an artificial neural network was successfully simulated for handwritten digit recognition with a high accuracy of 93.6%. These findings highlight the potential of 2D ferroelectric field-effect transistors as ideal building blocks for high-performance neuromorphic networks.
Article
Multidisciplinary Sciences
Haifeng Yang, Jingjing Gao, Yingying Cao, Yuanji Xu, Aiji Liang, Xiang Xu, Yujie Chen, Shuai Liu, Kui Huang, Lixuan Xu, Chengwei Wang, Shengtao Cui, Meixiao Wang, Lexian Yang, Xuan Luo, Yuping Sun, Yi-feng Yang, Zhongkai Liu, Yulin Chen
Summary: Mott physics plays a critical role in materials with strong electronic correlations. The transition from Mott insulator to metal in transition metal oxides is mainly driven by chemical doping, external pressure, temperature, and gate voltage, while in 4f-electron systems, it is mainly driven by Kondo hybridization. However, in YbInCu4, an unusual Mott instability is found to accompany its first-order valence transition, challenging the prevalent Kondo picture. This work provides important insight into the understanding and manipulation of correlated quantum phenomena in the f-electron system.
NATIONAL SCIENCE REVIEW
(2023)
Article
Multidisciplinary Sciences
Hanghui Chen, Yi-feng Yang, Guang-Ming Zhang, Hongquan Liu
Summary: In this study, first-principles calculations are used to demonstrate a charge-transfer-driven charge order mechanism in infinite-layer nickelates, resulting in a characteristic stripe state. The stability of this charge order arises from the competition between Hubbard interaction on Ni-d orbitals and charge transfer energy between Ni-d orbitals and conduction bands.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Qizhi Li, Abhishek Nag, Xiquan Zheng, Fucong Chen, Jie Yuan, Kui Jin, Yi Lu, Ke-Jin Zhou, Yingying Peng
Summary: Recently, emergent superconductivity was discovered in MgTi2O4, which is attributed to the increase of electron doping and the suppression of orbital order. Ti L-edge resonant inelastic x-ray scattering was used to study the orbital excitations in superconducting and insulating MgTi2O4 films. The results provide spectroscopic evidence for the competition between orbital order and superconductivity in MgTi2O4 and shed light on searching for novel superconductors in spinel oxides.
Article
Materials Science, Multidisciplinary
Yi Zhang, Yuhao Gu, Hongming Weng, Kun Jiang, Jiangping Hu
Summary: We investigate the strong electron-electron correlation effects in two-dimensional van der Waals materials Nb3X8 (X = Cl, Br, I). The monolayers Nb3X8 are close to the strong correlation limit and can be described by a half-filled single band Hubbard model with U/W ratio approximating to 5-10. Mott and magnetic transitions are calculated using the slave boson mean-field theory, and a dx2-y2 + idxy superconducting pairing instability is found upon doping the Mott state. A tunable bilayer Hubbard system is also constructed for two sliding Nb3X8 layers, showing a crossover between band insulator and Mott insulator.
Letter
Chemistry, Physical
Jie Qi, Yunchi Zhao, He Huang, Yi Zhang, Haochang Lyu, Guang Yang, Jingyan Zhang, Bokai Shao, Kui Jin, Ying Zhang, Hongxiang Wei, Baogen Shen, Shouguo Wang
Summary: The interplay between the interfacial crystalline structure and Dzyaloshinskii-Moriya interaction (DMI) was studied in Fe-inserted Pt/Co/Ir perpendicular magnetized multilayers. It was found that the Fe/Ir interface exhibits positive interfacial DMI (iDMI) with 2 ML Fe insertion, while negative iDMI with a layer shifting of 1-ML Fe insertion. The total iDMI of the multilayers increases (decreases) due to the additive enhancement (competitive counteraction) between the iDMI of Fe/Ir and Pt/Co interfaces. The crystallinity nearby the heterointerfaces was found to significantly affect the iDMI of the multilayers. This work provides valuable insights into the physical mechanism of iDMI and offers a viable strategy for tailoring the iDMI of multilayers through crystal engineering.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Kun Jiang, Ziyue Qi, Hongming Weng, Jiangping Hu
Summary: In this study, we examine the properties of obstructed atomic insulators under correlation and find that the obstruction properties persist even at high correlation levels. This suggests that the obstructed atomic insulator phase can transition to its Mott phase seamlessly without undergoing a Mott transition.
