Tunneling Conductance in Normal Metal-High-Tc Cuprate Junctions in the Presence of Magnetic Field

Yukio Tanaka, Hiroyoshi Itoh, Yasunari Tanuma, Hiroki Tsuchiura, Junichiro Inoue, Satoshi Kashiwaya

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

The magnetic field responses of the zero-bias conductance peak (ZBCP) in tunneling spectra of high-Tc cuprate junctions are studied theoretically. Our calculation is based on the lattice Green's function method and takes the realistic electronic structure of the high-Tc cuprate into account. In marked contrast to previous works, it is shown that the critical magnetic field strength Hc exists for the splittings of the ZBCP's to be discernible. HC is almost proportional to the product of the magnitude of pair potential, transmissivity of the junction, and the inverse of the Fermi velocity parallel to the interface (1/υFy). The calculated Hc's for the hole-doped superconductors are higher than those for electron-doped ones because of relatively large magnitude of pair potential and the small magnitude of υFy originating from peculiar shape of the Fermi surface.

Original languageEnglish
Pages (from-to)2005-2009
Number of pages5
Journaljournal of the physical society of japan
Volume71
Issue number8
DOIs
Publication statusPublished - 2002 Aug

Keywords

  • Doppler shift
  • Fermi velocity
  • Zero-bias conductance peak
  • d-wave superconductor

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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