Review
Physics, Multidisciplinary
Rong Yu, Haoyu Hu, Emilian M. Nica, Jian-Xin Zhu, Qimiao Si
Summary: Electron correlations play a central role in iron-based superconductors, especially in the normal state and superconducting state with electron filling n similar to 6. The interplay between orbital-selective correlations and electronic nematicity is a key focus of study.
FRONTIERS IN PHYSICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Xiao-Yu Liu, Chong Qi
Summary: The program presented in this study can accurately solve the general pairing Hamiltonian for different mass systems. Utilizing the iterative Lanczos algorithm for matrix diagonalization, it can efficiently compute on standard desktop computers.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
Ke Liu, Shuhui Yang, Weiqi Li, Tao Ying, Jianqun Yang, Xiudong Sun, Xingji Li
Summary: Using finite-temperature determinant quantum Monte Carlo algorithm, the study investigates the effective pairing susceptibility in the two-dimensional Hubbard model, identifying the dominant pairing channels in different parameter regimes. The dominant pairing is found to be d(x2-y2)-wave at half-filling, while in doping cases, the dominant channel may switch between d(x2-y2)-wave and d(xy)-wave.
Article
Computer Science, Interdisciplinary Applications
Xiao-Yu Liu, Chong Qi, Xin Guan, Zhong Liu
Summary: An efficient program for exact diagonalization of the pairing Hamiltonian in spherical systems is presented, utilizing the SU(2) quasi-spin algebra. Basis vectors with quasi-spin symmetry are generated iteratively, and the Hamiltonian matrix is diagonalized using the Lanczos algorithm. The program can calculate ground-state eigenvalues and eigenvectors of general spherical pairing Hamiltonians on standard desktop computers in a few hours, with a dimension of up to 10(8) for systems.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Chenyue Wen, Xingchuan Zhu, Zhisong Xiao, Ning Hao, Rubem Mondaini, Huaiming Guo, Shiping Feng
Summary: The dominating superconducting pairing symmetry of the Kagome-lattice Hubbard model is investigated using the determinant quantum Monte Carlo method. It is demonstrated that the dominating channel is the d wave in the hole-doped case, while the s* wave channel is favored by the electron doping. These results provide important insights into the pairing mechanism of superconducting states in Kagome compounds.
Article
Materials Science, Multidisciplinary
Fahad Mahmood, Thomas Devereaux, Peter Abbamonte, Dirk K. Morr
Summary: This study shows that double photoemission can be used to identify the pairing state in superconductors and provides direct insight into the center-of-mass momentum and spin state of the superconducting condensate, thus distinguishing between different superconducting pairing states. In addition, double photoemission can be used to map out the momentum dependence of the superconducting order parameter.
Article
Physics, Multidisciplinary
Orifjon Ganiev, Bakhrom Yavidov, Azamat Jalekeshov
Summary: In this study, the extended Ambegaokar-Baratoff model was utilized to calculate the critical current of an S/I/S Josephson junction with multiple tunnelling channels. The sensitivity of the IcRn product to the symmetries of the order parameter in the BCS-type gap formula was analyzed, revealing a shoulder-like feature and pronounced kink at around 10 K for the SmFeAsO0.9F0.1 superconductor.
PRAMANA-JOURNAL OF PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Rayan Farid, Maxence Grandadam, J. P. F. LeBlanc
Summary: We compute the diagrammatic expansion of the particle-particle susceptibility and correlated pairing susceptibility in the two-dimensional Hubbard model. We study the dependence of static susceptibility on pair momentum and find dx2-y2-wave pairing in the model. We identify key diagrams supporting pairing processes and find separate bosonic modes for pairing at momenta (0,0) and (pi,pi), with different weights for variation in temperature, doping, and interaction strength.
Article
Mechanics
Feng Pan, Aoxue Li, Yingxin Wu, J. P. Draayer
Summary: This paper investigates the homogenous three-site (trimer) Bose-Hubbard model with a periodic boundary condition. An exact solution is obtained by using an extended Bethe ansatz based on the solution of the dimer model and the site-permutation symmetry. The solution within the S(3) symmetric or non-symmetric subspace is presented, and the coupled differential equations of a series of extended Heine-Stieltjes polynomials are derived. Numerical examples for the model with N <= 4 are provided.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2023)
Article
Materials Science, Multidisciplinary
Yuri Fukaya, Yukio Tanaka, Paola Gentile, Keiji Yada, Mario Cuoco
Summary: We study the non-trivial properties of non-centrosymmetric superconductors with spin-triplet pairing, and investigate the effects of spin-orbit coupling on the Josephson behavior. The results demonstrate the potential for designing superconducting orbitronics devices and explain anomalies in oxide interface superconductors.
NPJ QUANTUM MATERIALS
(2022)
Article
Physics, Multidisciplinary
Shuhui Yang, Hengyu Liu, Weiqi Li, Jianqun Yang, Tao Ying, Xingji Li, Xiudong Sun
Summary: Using quantum Monte Carlo calculations, the effect of hopping anisotropy on d-wave pairing in ladder-type and layered cuprates was studied. On the square lattice, hopping anisotropy suppressed d-wave pairing, while on the two-leg ladder, there was an optimal hopping anisotropy that enhanced d-wave pairing. In the coupled two-leg ladder lattice, the evolution of d-wave pairing with hopping anisotropy exhibited a crossover from the square lattice to the two-leg ladder as the coupling strength decreased. These results provide numerical evidence for the possible enhancement of superconductivity in ladder-type and layered cuprates.
Article
Computer Science, Interdisciplinary Applications
Zhuoya Yu, Jiabao Wang, Lingyu Tian, Qiaoni Chen, Ying Liang, Tianxing Ma
Summary: The study investigates the superconducting pairing correlation in doped staggered-flux Hubbard model on a square lattice using constrained path quantum Monte Carlo simulation. The results show that the dxy pairing dominates due to its larger long-range correlation, and it is slightly suppressed by increasing the nearest-neighbor interaction V.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2021)
Article
Chemistry, Multidisciplinary
Chaofei Liu, Andreas Kreisel, Shan Zhong, Yu Li, Brian M. Andersen, Peter Hirschfeld, Jian Wang
Summary: This study observes highly anisotropic magnetic Cooper pairing in 1-UC FeSe, indicating the general existence of orbital selectivity in iron-based superconductors and the universal significance of electron correlations in high-Tc superconductors.
Article
Materials Science, Multidisciplinary
Sophia Simon, Max Geier, Piet W. Brouwer
Summary: Using the relationship between topological gapless phases in three dimensions and topological gapped phases in two dimensions, this study identifies four types of higher-order topological semimetals or nodal superconductors (HOTS), each exhibiting different characteristics at crystal hinges, with their properties corresponding to the bulk topology.
Article
Physics, Multidisciplinary
B. Gremaud, G. G. Batrouni
Summary: The study uses computational methods to investigate the onset and properties of pair superfluidity in various systems with interspecies attraction, showing that pairs are the sole contributors to superfluidity under attractive interactions and this crucial property is often overlooked in previous studies.
PHYSICAL REVIEW LETTERS
(2021)