Coexistence of superconductivity and antiferromagnetism and its effects on crossover as to correlation strength in Hubbard model

K. Kobayashi, H. Yokoyama

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

Using a variational Monte Carlo method, the interplay between antiferromagnetism and superconductivity is studied for the twodimensional Hubbard model with a diagonal transfer . It is found with a refined function that the optimized state is sensitive to the values of model parameters, , , and (doping rate), and becomes a coexisting state or a pure superconducting (SC) state. SC properties in the coexisting state also undergo considerable changes around the crossover point from a fragile BCS type for to an unconventional one for , in which pairs are formed through local exchange or doublon-holon processes, but supercurrent flows separately with the doped holes.

Original languageEnglish
Pages (from-to)17-20
Number of pages4
JournalPhysics Procedia
Volume45
DOIs
Publication statusPublished - 2013 Jan 1
Event25th International Symposium on Superconductivity, ISS 2012 - Tokyo, Japan
Duration: 2012 Dec 32012 Dec 5

Keywords

  • Cuprate
  • Hubbard model
  • Mott physics
  • Superconductivity
  • Variational Monte Carlo method

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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