Abstract
We derive an equation determining the upper critical field H∥c2(T) parallel to conducting planes of a layered superconductor from the BCS theory. It extends the descriptions of H∥c2(T) within the Ginzburg-Landau-Abrikosov-Gor'kov theory and the Lawrence-Doniach model to the case of strong magnetic fields. From this equation, it follows that orbital effects of an electron motion along an open Fermi surface in a magnetic field start to restore superconductivity at magnetic fields higher than the quasiclassical upper critical field and result in the appearance of a reentrant phase with Tc(H)≃Tc(0). A stability of the reentrant phase against fluctuations is discussed.
Original language | English (US) |
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Pages (from-to) | 2697-2700 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 80 |
Issue number | 12 |
DOIs | |
State | Published - 1998 |
Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy