Quasiparticle bound states near the interface of high-Tc superconductors

Y. Tanaka, H. Itoh, H. Tsuchiura, Y. Tanuma, J. Inoue, S. Kashiwaya

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In high-Tc superconductor junctions, due to the sign changing behavior of the pair potential, the zero bias conductance peak (ZBCP) appears in the quasiparticle tunneling spectroscopy. In this paper, we will discuss unresolved problems about ZBCP, i.e., effect of magnetic field and Fermi surface. In the former part of the paper, it is shown that ZBCP does not split into two by the magnetic field, when the transparency of the junction is sufficiently large. In the latter part of the paper, we will extend our theory to include the effect of Fermi surface based on the Green's function theory and linear response theory. We will clarify ZBCP always appears for interface even if we take into account of the Fermi surface mismatch at the interface.

Original languageEnglish
Pages (from-to)73-78
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume367
Issue number1-4
DOIs
Publication statusPublished - 2002 Feb 15
Externally publishedYes

Keywords

  • N/I/D junction
  • Tunnel conductance
  • Zero bias conductance peak

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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