Zobrazeno 1 - 10
of 4 445
pro vyhledávání: '"BCS BEC Crossover"'
We present a theory of SNS junctions, a normal metal sandwiched between two superconductors, along the crossover from the BCS to the BEC regime. We calculate the Josephson current as a function of the chemical potential relative to the band edge in t
Externí odkaz:
http://arxiv.org/abs/2411.19396
Autor:
Watanabe, Hiroshi, Ikeda, Hiroaki
The realization of BCS-BEC crossover in superconductors, which smoothly connects Bardeen-Cooper-Schrieffer (BCS) theory with Bose-Einstein Condensation (BEC) in fermion systems, is an intriguing recent topic in strongly correlated electron systems. T
Externí odkaz:
http://arxiv.org/abs/2411.15510
Autor:
Park, Tae-Ho, Choi, Han-Yong
We investigate the emergence of the collective mode in the phonon spectra of the superconducting state within the Holstein model by varying the electron-phonon coupling. Using dynamical mean field theory (DMFT) combined with the numerical renormaliza
Externí odkaz:
http://arxiv.org/abs/2411.14782
Autor:
Kawamura, Taira, Ohashi, Yoji
We present a theoretical review of the recent progress in nonequilibrium BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein condensation) crossover physics. As a paradigmatic example, we consider a strongly interacting driven-dissipative two-componen
Externí odkaz:
http://arxiv.org/abs/2408.00446
Autor:
Jia, Junjie, Gu, Yadong, Yin, Chaohui, Shu, Yingjie, Chen, Yiwen, Shi, Jumin, Zhang, Xing, Chen, Hao, Miao, Taimin, Ren, Xiaolin, Liang, Bo, Zhu, Wenpei, Cai, Neng, Zhang, Fengfeng, Zhang, Shenjin, Yang, Feng, Wang, Zhimin, Peng, Qinjun, Xu, Zuyan, Mao, Hanqing, Liu, Guodong, Ren, Zhian, Zhao, Lin, Zhou, X. J.
Publikováno v:
Chinese Physics B 33, 077404 (2024)
In iron-based superconductor Fe(Se,Te), a flat band-like feature near the Fermi level was observed around the Brillouin zone center in the superconducting state. It is under debate whether this is the evidence on the presence of the BCS-BEC crossover
Externí odkaz:
http://arxiv.org/abs/2407.20771
Autor:
Taira Kawamura, Yoji Ohashi
Publikováno v:
AAPPS Bulletin, Vol 34, Iss 1, Pp 1-32 (2024)
Abstract We present a theoretical review of the recent progress in non-equilibrium BCS (Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein condensation) crossover physics. As a paradigmatic example, we consider a strongly interacting driven-dissipative tw
Externí odkaz:
https://doaj.org/article/41885c3654434fc0ada68e9fd9b64973
Publikováno v:
Phys. Rev. A 110, 043320 - Published 25 October 2024
We present Quantum Monte Carlo calculations of the properties of a two-component mass imbalanced Fermi gas, corresponding to the $^6$Li-$^{40}$K mixture. We compute the equation of state of the unpolarized system as a function of the scattering lengt
Externí odkaz:
http://arxiv.org/abs/2407.12102
Nonadiabatic effects in the electron-phonon coupling are important whenever the ratio between the phononic and the electronic energy scales, the adiabatic ratio, is non negligible. For superconducting systems, this gives rise to additional diagrams i
Externí odkaz:
http://arxiv.org/abs/2406.13541
Autor:
Ye, Yuhao, Wang, Jinhua, Nie, Pan, Zuo, Huakun, Li, Xiaokang, Behnia, Kamran, Zhu, Zengwei, Fauqué, Benoît
In graphite, a moderate magnetic field confines electrons and holes into their lowest Landau levels. In the extreme quantum limit, two insulating states with a dome-like field dependence of the their critical temperatures are induced by the magnetic
Externí odkaz:
http://arxiv.org/abs/2404.18727
Recent experiments on 2D superconductors allow the characterization of the critical temperature and of the phase diagram across the BCS-BEC crossover as a function of density. We obtain from these experiments the microscopic parameters of the superco
Externí odkaz:
http://arxiv.org/abs/2403.03025