Article
Physics, Multidisciplinary
Fan-Ying Wu, Qi-Yi Wu, Chen Zhang, Yang Luo, Xiangqi Liu, Yuan-Feng Xu, Dong-Hui Lu, Makoto Hashimoto, Hao Liu, Yin-Zou Zhao, Jiao-Jiao Song, Ya-Hua Yuan, Hai-Yun Liu, Jun He, Yu-Xia Duan, Yan-Feng Guo, Jian-Qiao Meng
Summary: The three-dimensional electronic structure and the nature of Ce 4f electrons of the Kondo insulator CeRu4Sn6 are studied using angle-resolved photoemission spectroscopy with tunable photon energies. The findings include the three-dimensional k-space nature of the Fermi surface, the localized-to-itinerant transition of f electrons occurring at a much higher temperature than the hybridization gap opening temperature, and the relocalization of itinerant f-electrons below 25 K, which could be the precursor to the establishment of magnetic order.
FRONTIERS OF PHYSICS
(2023)
Review
Chemistry, Physical
Vasily R. Shaginyan, Alfred Z. Msezane, George S. Japaridze, Stanislav A. Artamonov, Yulya S. Leevik
Summary: This review discusses the topological fermion condensation quantum phase transition (FCQPT) in strongly correlated Fermi systems, and compares theoretical considerations with experimental data. The study finds that the fermion condensation theory provides a sound explanation for the complex behavior and thermodynamic/transport properties of frustrated insulators and heavy fermion metals.
Review
Physics, Condensed Matter
M. Naritsuka, T. Terashima, Y. Matsuda
Summary: Unconventional superconductivity and magnetism are studied through atomic interface in hybrid superlattices. Different Kondo superlattices with heavy-fermion compounds are fabricated to investigate the mutual interaction between superconductivity and magnetic order. The coexistence and coupling of superconducting and antiferromagnetic states in spatially separated layers are observed, providing new insights into the relationship between unconventional superconductivity and magnetism.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Physics, Condensed Matter
S. Y. Agustsson, S. Chernov, K. Medjanik, S. Babenkov, O. Fedchenko, D. Vasilyev, C. Schlueter, A. Gloskovskii, Yu Matveyev, K. Kliemt, C. Krellner, J. Demsar, G. Schoenhense, H-J Elmers
Summary: The heavy-fermion behavior in intermetallic compounds is characterized by a quenching of local magnetic moments and a change in the Fermi surface due to interactions between 4f electrons and conduction electrons. As the temperature decreases, the electronic structure transitions from a small to a large Fermi surface.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Zhihua Yang, Zhen Yang, Qiping Su, Enda Fang, Jinhu Yang, Bin Chen, Hangdong Wang, Jianhua Du, Chunxiang Wu, Minghu Fang
Summary: This paper investigates the superconducting and normal state properties of TlBi2 with the AlB2-type structure. It is found that TlBi2 exhibits bulk superconductivity and is a phonon-mediated s-wave superconductor. Furthermore, the study reveals that the temperature dependence of the resistivity, p(T), shows a linear relationship at high temperatures and can be described by the Fermi-liquid theory at low temperatures. Interestingly, the Kadowaki-Woods ratio of TlBi2 is unexpectedly large compared to many heavy fermion compounds.
Article
Physics, Multidisciplinary
Matthias Pickem, Emanuele Maggio, Jan M. Tomczak
Summary: Kondo insulators exhibit characteristic low-temperature saturation in resistivity, potentially due to the finite lifetimes of intrinsic bulk carriers. Metallic surface states may serve as a likely source of residual conduction. At low temperature, in addition to the charge gap, the scattering rate becomes a relevant energy scale, leading to invalidation of the semi-classical Boltzmann picture.
COMMUNICATIONS PHYSICS
(2021)
Article
Physics, Multidisciplinary
Meng Lyu, Hengcan Zhao, Jiahao Zhang, Zhen Wang, Shuai Zhang, Peijie Sun
Summary: Needle-like single crystals of CeAu2In4 have been grown and characterized as a new candidate of quasi-one-dimensional Kondo lattice compound, showing antiferromagnetic transition, Fermi liquid behavior, and a low Kondo temperature. The system exhibits similarities to YbNi4P2 and CeRh6Ge4 with a tunable ferromagnetic quantum critical point. CeAu2In4 appears to be an interesting model system for exploring antiferromagnetic quantum critical behaviors in a quasi-one-dimensional Kondo lattice with enhanced quantum fluctuations.
Article
Physics, Multidisciplinary
Kangqiao Cheng, Binjie Zhou, Cuixiang Wang, Shuo Zou, Yupeng Pan, Xiaobo He, Jian Zhang, Fangjun Lu, Le Wang, Youguo Shi, Yongkang Luo
Summary: This study investigates the effect of uniaxial stress on the quasi-one-dimensional Kondo lattice CeCo2Ga8. The results show that a tensile intra-chain strain enhances the quasi-one-dimensional Kondo effect, while a compressive intra-chain strain causes deviation.
Article
Multidisciplinary Sciences
Nikola Maksimovic, Daniel H. Eilbott, Tessa Cookmeyer, Fanghui Wan, Jan Rusz, Vikram Nagarajan, Shannon C. Haley, Eran Maniv, Amanda Gong, Stefano Faubel, Ian M. Hayes, Ali Bangura, John Singleton, Johanna C. Palmstrom, Laurel Winter, Ross McDonald, Sooyoung Jang, Ping Ai, Yi Lin, Samuel Ciocys, Jacob Gobbo, Yochai Werman, Peter M. Oppeneer, Ehud Altman, Alessandra Lanzara, James G. Analytis
Summary: This article discusses the existence of a quantum critical point in the unconventional superconductor CeCoIn5, characterized by the connection of Fermi surfaces and electron delocalization, without apparent broken symmetry. The article provides a model that interprets this transition as the fractionalization of spin and charge, effectively describing the anomalous transport behavior observed for the Hall effect.
Article
Materials Science, Multidisciplinary
Akira Kofuji, Yoshihiro Michishita, Robert Peters
Summary: Nonlinear responses in Ce3Bi4Pd3, such as the giant spontaneous Hall effect, are believed to be enhanced by strong correlation effects. By using dynamical mean-field theory and the Kubo formula, researchers simulated and calculated the nonlinear conductivities of Ce3Bi4Pd3, showing the influence of strong correlations on nonlinear responses.
Article
Materials Science, Multidisciplinary
Jackson R. Badger, Rumika Miyawaki, Zach E. Brubaker, Peter Klavins, Rena Zieve, Tatsuma D. Matsuda, Valentin Taufour
Summary: The Ce1-xNdxIn3 phase diagram was investigated in this study, revealing two distinct broad resistance peaks in the most disordered substitution region. The magnetic susceptibility and resistance data show competition between antiferromagnetic ordering in CeIn3 and NdIn3, with the antiferromagnetic transition of CeIn3 suppressed linearly when the concentration of Nd reaches around 0.6.
Article
Materials Science, Multidisciplinary
Damian Tomaszewski, Piotr Busz, Jan Martinek
Summary: This paper provides a detailed theoretical description of the influence of spin accumulation in metallic Fermi leads on the Kondo effect in systems such as quantum dots and Kondo alloys. The study shows that the presence of spin accumulation, magnetic field, and ferromagnetic leads spin polarization can suppress the Kondo effect, but for appropriately selected parameter values, these effects can compensate each other and may lead to the restoration of the Kondo effect in the analyzed systems. The paper also discusses recent experiments related to spin current in Kondo alloys.
Article
Physics, Multidisciplinary
Jiangfan Wang, Yi-Feng Yang
Summary: Magnetic frustrations can enhance quantum fluctuations and lead to exotic topological insulating states in spin systems. When coupled to mobile electrons, they may give rise to unusual non-Fermi liquid or metallic spin liquid states whose nature has not been well explored. By considering a spin current Kondo mechanism in a frustrated Kondo model, a series of non-Fermi liquid phases can be formed.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Physics, Multidisciplinary
Harim Jang, Vuong Thi Anh Hong, Jihyun Kim, Xin Lu, Tuson Park
Summary: The origin of the partial suppression of the electronic density states in the pseudogap behavior in high-Tc superconductivity has been controversial. This study investigates the quasiparticle scattering spectroscopy of the quantum critical superconductor CeCoIn5 and reveals the presence of a pseudogap with energy Ag. The results suggest that the pseudogap in CeCoIn5 is controlled by Kondo hybridization instead of being involved in the formation of superconducting Cooper pairs.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Hee Seung Kim, Hyeok-Jun Yang, SungBin Lee
Summary: This study investigates the phase diagram of the J(1)-J(2) Kondo-Heisenberg model on a honeycomb lattice at a quarter filling, discussing the emergence of partial Kondo screening in the frustrated regime and the appearance of a fractionalized superconductor (SC*) analogous to the FL*.
Article
Multidisciplinary Sciences
Jie Yuan, Qihong Chen, Kun Jiang, Zhongpei Feng, Zefeng Lin, Heshan Yu, Ge He, Jinsong Zhang, Xingyu Jiang, Xu Zhang, Yujun Shi, Yanmin Zhang, Mingyang Qin, Zhi Gang Cheng, Nobumichi Tamura, Yi-feng Yang, Tao Xiang, Jiangping Hu, Ichiro Takeuchi, Kui Jin, Zhongxian Zhao
Summary: The research uncovers the precise quantitative scaling laws among the superconducting transition temperature, the linear-in-T scattering coefficient, and the doping level in electron-doped copper oxide La2-xCexCuO4, suggesting a common mechanism of the strange-metal behavior and unconventional superconductivity in these systems.
Article
Chemistry, Physical
Xu Zheng, Jiao Tan, Qianqian Wang, Chan Gao, Xiaohui Yu, Wenhui Xie, Yifeng Yang, Yujie Wang, Changqing Jin
Summary: In this study, MnN single crystal was synthesized under high pressure and temperature, and a first-order phase transition accompanied by an antiferromagnetic to ferromagnetic magnetic structure transition was observed. The magnetic and structural transition of MnN was found to be induced by the enhanced ferromagnetic double exchange interactions in the [001] plane. These findings provide important insights for the development of GaMnN or MnN layer diluted magnetic semiconductor materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(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
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
Biochemistry & Molecular Biology
Ying Zhang, Bingfeng Fan, Xiaoxia Li, Yu Tang, Jing Shao, Lixiang Liu, Yuhe Ren, Yifeng Yang, Baozeng Xu
Summary: The expression levels and localization of ADD1 and TPX2 proteins undergo dynamic changes during spindle assembly in mouse oocytes. Deficiency of ADD1 destabilizes interpolar microtubules and leads to chromosome alignment errors and aneuploidy, while deficiency of TPX2 causes spindle collapse and arrest at the metaphase I stage.
CELL AND BIOSCIENCE
(2022)
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
Polymer Science
Chengpeng Li, Yanting Shi, Huixin Su, Yifeng Yang, Wen Li, Tong Zhang, Weiyin Chen, Roujun Lin, Yongzheng Li, Lusheng Liao
Summary: Siloxane elastomers were enhanced with multi-strength hydrogen bonds and dynamic disulfide bonds to achieve high stretchability, mechanical strength, self-healing capacity, and recyclability. The ratio of hydrogen bonding networks was adjusted to tune the mechanical properties and self-healing efficiency of the elastomers. The introduction of aromatic disulfide resulted in significantly improved tensile strength, strain, and toughness, with a healing efficiency of 75%. A self-healing flexible bifunctional sensor was also developed using liquid metal alloy encapsulated between the elastomers layers for pressure and motion detection.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Engineering, Civil
Xiaoyu Yang, Liyang Xie, Jiaxin Song, Jianpeng Chen, Bingfeng Zhao, Yifeng Yang
Summary: In this paper, an optimal probability estimator for Weibull parameters is obtained through Monte Carlo simulations, and it is found to exhibit stronger robustness and higher accuracy compared to five commonly used estimators, especially in cases of small sample sizes. The recommended optimal probability estimator is the midpoint rank for LRE, MDE, and EIV in practical applications.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Physics, Multidisciplinary
Dongchen Huang, Junde Liu, Tian Qian, Yi-Feng Yang
Summary: De-noising is crucial in spectrum post-processing. In this study, we propose a de-noising method for angle-resolved photoemission spectroscopy (ARPES) to extract intrinsic spectral information without a training set. Our method utilizes the self-correlation information of the spectra themselves, preserving the intrinsic energy band features for further analysis and processing. It has the potential to be extended to other fields and application scenarios with challenging training data acquisition.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2023)
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
Multidisciplinary Sciences
Jiangfan Wang, Yi-feng Yang
Summary: Understanding the nature of local-itinerant transition of strongly correlated electrons is a central problem in condensed matter physics. A solvable Kondo-Heisenberg model is proposed to investigate this issue, which reveals the continuous evolution of Fermi surfaces and two-fluid behaviors, providing important insight into the microscopic description of two-fluid phenomenology in heavy fermion systems.
Article
Materials Science, Multidisciplinary
Junde Liu, Dongchen Huang, Yi-feng Yang, Tian Qian
Summary: Spectroscopic data often contains unwanted extrinsic signals. A deep learning method is proposed in this study to effectively overcome this problem by utilizing the self-correlation information within the spectra. This method can remove the grid structure and noise while optimizing the quality of the spectra, potentially enhancing spectral measurements in various spectroscopic experiments.
Article
Materials Science, Multidisciplinary
P. Zheng, Cuixiang Wang, Yuanji Xu, L. Wang, W. Wu, Y. G. Shi, Yi-feng Yang, J. L. Luo
Summary: We investigated the electron dynamics of the quasi-one-dimensional Kondo lattice compound CeCo2Ga8 using optical spectra measurements. Our results show that the high-temperature Drude-like peak splits into two components below the coherence temperature T* when an electric field is applied along the c axis. This splitting is absent for electric fields along perpendicular directions, indicating that hybridization only occurs along the c axis. Our findings confirm the quasi-one-dimensional nature of the heavy electron physics in CeCo2Ga8 and highlight the importance of intersite magnetic correlations.