Journal ArticleDOI
Temperature and Purity Dependence of the Superconducting Critical Field, H c 2 . III. Electron Spin and Spin-Orbit Effects
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In this paper, a solution of the linearized Gor'kov equations for the upper critical magnetic field of a bulk type-II superconductor is extended to include the effects of Pauli spin paramagnetism and spin-orbit impurity scattering.Abstract:
A previously obtained solution of the linearized Gor'kov equations for the upper critical magnetic field ${H}_{c2}$ of a bulk type-II superconductor is extended to include the effects of Pauli spin paramagnetism and spin-orbit impurity scattering. To carry out the calculation, it is necessary to introduce an approximation which assumes that spin-orbit scattering is infrequent in comparison with spin-independent scattering. It is found that spin-orbit scattering counteracts the effects of the spin paramagnetism in limiting the critical field and improves agreement between theory and experiment.read more
Citations
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Superconductivity in iron compounds
TL;DR: A detailed review of the superconductivity of FePnictide and chalcogenide (FePn/Ch) superconductors can be found in this paper.
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Superconductivity in diamond
Evgeny A. Ekimov,Vladimir A. Sidorov,Eric D. Bauer,N. N. Melnik,Nicholas Curro,Joe D. Thompson,S. M. Stishov +6 more
TL;DR: Electrical resistivity, magnetic susceptibility, specific heat and field-dependent resistance measurements show that boron-doped diamond is a bulk, type-II superconductor below the superconducting transition temperature Tc ≈ 4 K; superconductivity survives in a magnetic field up to Hc2(0) ≥ 3.5 T.
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Ising pairing in superconducting NbSe2 atomic layers
Xiaoxiang Xi,Zefang Wang,Weiwei Zhao,Ju-Hyun Park,Kam Tuen Law,Helmuth Berger,László Forró,Jie Shan,Kin Fai Mak +8 more
TL;DR: In this article, the superconducting properties of NbSe2 as it approaches the monolayer limit are investigated by means of magnetotransport measurements, uncovering evidence of spin-momentum locking.
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Superconductivity in fullerides
TL;DR: Theoretical calculations of the electron-phonon coupling, in particular for the intramolecular phonons, are discussed extensively in this paper, and the calculations are compared with coupling constants deduced from a number of different experimental techniques.
Journal ArticleDOI
Temperature and Purity Dependence of the Superconducting Critical Field, H c 2 . II
Eugene Helfand,N. R. Werthamer +1 more
TL;DR: In this paper, a rigorous solution of the linearized Gor'kov equations is presented, yielding the complete temperature and electron-mean-free-path dependences of the upper critical magnetic field of a bulk type-II superconductor.
References
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Journal ArticleDOI
Superconductivity in a Strong Spin-Exchange Field
Peter Fulde,Richard A. Ferrell +1 more
TL;DR: In this paper, it was shown that the depaired state has a spatially dependent complex Gorkov field, corresponding to a nonzero pairing momentum in the BCS model, and that the presence of the "normal" electrons from the broken pairs reduces the total current to zero, gives the deblating state some spin polarization, and results in almost normal Sommerfeld specific heat and single-electron tunneling characteristics.
Journal ArticleDOI
Upper Limit for the Critical Field in Hard Superconductors
TL;DR: In this paper, an examination of some recent reports dealing with the extremely high critical fields in certain hard superconductors was presented, and it was concluded that the critical fields for these BETA -wolfran compounds are so high that they may be effectively limited at low temperatures by the normal-state paramagnetism.
Journal ArticleDOI
Quasi-particles and gauge invariance in the theory of superconductivity
TL;DR: In this paper, it was shown that the Meissner effect can be maintained in the quasi-particle picture by taking into account a certain class of corrections to the chargecurrent operator due to the phonon and Coulomb interaction.
Journal ArticleDOI
A note on the maximum critical field of high‐field superconductors
TL;DR: In this paper, the maximum field at which a superconductor maintains superconductivity is recognized as a parameter of the super-conductor, and an attempt is made to find a relation between maximum field and critical temperature.
Journal ArticleDOI
Temperature and Purity Dependence of the Superconducting Critical Field, H c 2 . II
Eugene Helfand,N. R. Werthamer +1 more
TL;DR: In this paper, a rigorous solution of the linearized Gor'kov equations is presented, yielding the complete temperature and electron-mean-free-path dependences of the upper critical magnetic field of a bulk type-II superconductor.