caa a22 4500 469040971 CHVBK 20180323132811.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF02847280 doi (NATIONALLICENCE)springer-10.1007/BF02847280 Magnetic field dependence of T c and temperature dependence of H c 2 in layered superconductors with open normal state Fermi surface [Elektronische Daten] [Sudhanshu Jha, A Rajagopal] A theoretical framework for treating the effects of magnetic fieldH on the pairing theory of superconductivity is considered, where the field is taken in an arbitrary direction with respect to crystal axes. This is applicable to closed, as well as open normal state Fermi surface (FS), including simple layered metals. The orbital effects of the magnetic field are treated semiclassically while retaining the full anisotropic paramagnetic contribution. Explicit calculations are presented in the limits |H| → |H c2(T)|,T ∼ 0 andT →T c(|H|), |H| ∼ 0. Effects of weak nonmagnetic impurity scattering, without vertex corrections, have also been taken into account in a phenomenological way. The final results for the case of open FS and layered materials are found to differ considerably from those of the closed FS. For example, an important parameter,h(T=0)=|Hc2(0)|/[-Tδ|H c2 T|δT]T{s0} for the case of a FS open ink z-direction with thek z-bandwidth, 4t 3, very small compared to the Fermi energy,E F, is close to 0.5906, compared to 0.7273 for the closed FS, in the clean limit. Analytical results are given for the magnetic field dependence ofT c and the temperature dependence of H c2 for a model of layered superconductors with widely open FS. For a set of band structure parameters for YBa2Cu3O7 used elsewhere, we find reasonable values for the upper critical fieldH c2(0), the slope (dH c2/dT)T c0, anisotropic coherence lengths ζi(T=0),i=x, y, z, and (dT c/d|H|)|H| → 0. the Indian Academy of Sciences, 1992 Upper critical magnetic field nationallicence layered superconductors nationallicence open Fermi surface nationallicence 74.20 nationallicence 74.70 nationallicence 74.60 nationallicence Jha Sudhanshu Tata Institute of Fundamental Research, 400 005, Bombay, India aut Rajagopal A. Tata Institute of Fundamental Research, 400 005, Bombay, India aut Pramana Springer India 39/6(1992-12-01), 615-631 0304-4289 39:6<615 1992 39 12043 https://doi.org/10.1007/BF02847280 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02847280 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jha Sudhanshu Tata Institute of Fundamental Research, 400 005, Bombay, India aut NATIONALLICENCE 700 1- Rajagopal A. Tata Institute of Fundamental Research, 400 005, Bombay, India aut NATIONALLICENCE 773 0- Pramana Springer India 39/6(1992-12-01), 615-631 0304-4289 39:6<615 1992 39 12043 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer