Vortex core structure in strongly correlated superfluidity

S. Yamada, M. Okumura, M. Machida, Y. Ohashi, H. Matsumoto

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In order to study the vortex core electronic structure in high-Tc superconductors, we examine 1-D Hubbard model with trap potential by using the density matrix renormalization group method. Instead of directly treating the vortex, the approach mimics the carrier density depression inside the vortex core via the trap potential and exactly calculate strong correlation effects on the depressed region. Consequently, we find that the Mott state emerges in the central region and the metallic edge surrounds the Mott region. Furthermore, when adding spin imbalance, the calculations reveal that a local antiferromagnetic order covers the Mott state region, and moreover, the antiferromagnetic order modulates with a long periodicity. We expect that these results closely relate to the vortex core electronic structure while their calculation results can be directly compared with atomic Fermi gases loaded on an optical lattice.

Original languageEnglish
Pages (from-to)1237-1240
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume468
Issue number15-20
DOIs
Publication statusPublished - 2008 Sep 15

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Keywords

  • Density matrix renormalization group
  • High-T superconductors
  • Hubbard model
  • Vortex core

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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