Theoretical description of nearly discontinuous transition in superconductors with paramagnetic depairing

Hiroto Adachi, Shigeru Koikegami, Ryusuke Ikeda

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Based on a theoretical argument and Monte Carlo simulations of a Ginzburg-Landau model derived microscopically, it is argued that, in type-II superconductors where both the paramagnetic and orbital depairings are important, a strong first-order transition (FOT) at Hc2 expected in the mean field (MF) approximation never occurs in real systems and changes due to the fluctuation into a crossover. The present result explains why a nearly discontinuous crossover at Hc2 with no intrinsic hysteresis is observed only in a clean superconducting material with a singlet pairing and a high condensation energy such as CeCoIn5.

Original languageEnglish
Pages (from-to)2460-2463
Number of pages4
Journaljournal of the physical society of japan
Volume72
Issue number10
DOIs
Publication statusPublished - Oct 1 2003
Externally publishedYes

Keywords

  • CeCoIn
  • Paramagnetic and orbital depairings
  • Upper critical field
  • Vortex phase diagram

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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