JOSEPHSON-COUPLED LAYERED SUPERCONDUCTORS WITH 2 ORDER PARAMETERS .1. UPPER CRITICAL MAGNETIC-FIELD


NAKHMEDOV E., TAHIROV E.

JOURNAL OF PHYSICS-CONDENSED MATTER, vol.6, no.11, pp.2245-2258, 1994 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 6 Issue: 11
  • Publication Date: 1994
  • Doi Number: 10.1088/0953-8984/6/11/013
  • Title of Journal : JOURNAL OF PHYSICS-CONDENSED MATTER
  • Page Numbers: pp.2245-2258

Abstract

By using the Gor'kov-Nambu microscopic theory, an expression for the free-energy functional is obtained for Josephson-coupled layered superconductors with two order parameters corresponding to intra- and interlayer Cooper pairs. The existence of two order parameters in a system leads to the appearance of new terms in the free-energy functional known as the 'Josephson' terms and the Lifshitz invariant. Of these, the Josephson terms characterize the tunnelling of both intra- and interlayer Cooper pairs between neighbouring superconducting sheets.