Quasiparticle properties around a nonmagnetic impurity in the superconducting state of the two-dimensional t-J model

Hiroki Tsuchiura, Yukio Tanaka, Masao Ogata, Satoshi Kashiwaya

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)

Abstract

The superconducting state around a well-isolated nonmagnetic impurity in the high-Tc superconductors is studied using the two-dimensional t-J model. The spatial dependence of the order parameter and the local density of states are obtained from the numerical diagonalization of the Bogoliubov-de Gennes equation derived using the Gutzwiller approximation. We find a zero-energy peak in the local density of states around the impurity. Different from the previous results on a vortex or surfaces in the t-J model, the splitting of the zero-energy peak is not found. The zero-energy states corresponding to the zero-energy peak is approximately localized around the impurity.

Original languageEnglish
Pages (from-to)2510-2513
Number of pages4
Journaljournal of the physical society of japan
Volume68
Issue number8
DOIs
Publication statusPublished - 1999 Aug
Externally publishedYes

Keywords

  • A nonmagnetic impurity
  • Gutzwiller approximation
  • Two-dimensional t-J model
  • Zero-energy peak
  • d-wave superconductivity

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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