Local tunneling spectroscopy as a signature of the Fulde-Ferrell-Larkin- Ovchinnikov state in s- and d-wave superconductors

Qian Wang, H. Y. Chen, C. R. Hu, C. S. Ting

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) states for two-dimensional s- and d-wave superconductors (s- and d-SCs) are self-consistently studied under an in-plane magnetic field. While the stripe solution of the order parameter is found to have lower free energy in s-SCs, a square lattice solution appears to be energetically more favorable in the case of d-SCs. At certain symmetric sites, we find that the features in the local density of states (LDOS) can be ascribed to two types of bound states. We also show that the LDOS maps for d-SCs exhibit bias-energy-dependent checkerboard patterns. These characteristics can serve as signatures of the FFLO states.

Original languageEnglish
Article number117006
JournalPhysical Review Letters
Volume96
Issue number11
DOIs
Publication statusPublished - 2006 Mar 30

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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