منابع مشابه
Anisotropic impurities in anisotropic superconductors
Physical properties of anisotropic superconductors like the critical temperature and others depend sensitively on the electron mean free path. The sensitivity to impurity scattering and the resulting anomalies are considered a characteristic feature of strongly anisotropic pairing. These anomalies are usually analyzed in terms of s-wave impurity scattering which leads to universal pair breaking...
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Superconductors, ideally diamagnetic when in the Meissner state, can also exhibit paramagnetic behavior due to trapped magnetic flux. In the absence of pinning such paramagnetic response is weak, and ceases with increasing sample thickness. Here we show that in multiband superconductors paramagnetic response can be observed even in slab geometries, and can be far larger than any previous estima...
متن کاملMassless collective excitations in frustrated multiband superconductors
Keita Kobayashi,1 Masahiko Machida,1,2 Yukihiro Ota,3 and Franco Nori3,4 1CCSE, Japan Atomic Energy Agency, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8587, Japan 2Computational Materials Science Research Team, RIKEN AICS, Kobe, Hyogo 650-0047, Japan 3CEMS, RIKEN, Saitama 351-0198, Japan 4Physics Department, University of Michigan, Ann Arbor, Michigan 48109-1040, USA (Received 2 October 2013; revise...
متن کاملZinc impurities in d-wave superconductors.
We study the two-dimensional Hubbard model with nonmagnetic Zn impurities modeled by binary diagonal disorder using quantum Monte Carlo within the dynamical cluster approximation. With increasing Zn content we find a strong suppression of d-wave superconductivity and an enhancement of antiferromagnetic spin correlations. T(c) vanishes linearly with Zn impurity concentration. The spin susceptibi...
متن کاملAndreev spectra and subgap bound states in multiband superconductors.
A theory of Andreev conductance is formulated for junctions involving normal metals (N) and multiband superconductors (S) and applied to the case of superconductors with nodeless extended s(+/-)-wave order parameter symmetry, as possibly realized in the recently discovered ferropnictides. We find qualitative differences from tunneling into s-wave or d-wave superconductors that may help to ident...
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ژورنال
عنوان ژورنال: Uspekhi Fizicheskih Nauk
سال: 2016
ISSN: 0042-1294,1996-6652
DOI: 10.3367/ufnr.2016.07.037863