Quasiparticle density of states in the perpendicular direction to the Cu-O planes in YBa2Cu3O7-x single-crystal thin films

J. Takada, T. Terashima, Y. Bando, H. Mazaki, K. Iijima, K. Yamamoto, K. Hirata

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Tunneling spectra were observed in normal-metalinsulatorsuperconductor junctions fabricated from single-crystal films of YBa2Cu3O7-x(001), epitaxially grown on SrTiO3(100). The quasiparticle density of states observed in the perpendicular direction to the Cu-O planes exhibits a lifetime broadening picture of quasiparticles at the gap edges. The broadening parameter increases with an increase of the temperature. The recombination lifetime at 60 K is estimated to be 10-13 s. A gap parameter "S (4.6 K) of 9.0±1.8 meV and a coupling constant of (2.4±0.5)<2"S (0)/kTc <(3.5±0.7) were obtained.

Original languageEnglish
Pages (from-to)4478-4481
Number of pages4
JournalPhysical Review B
Volume40
Issue number7
DOIs
Publication statusPublished - Jan 1 1989

ASJC Scopus subject areas

  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Quasiparticle density of states in the perpendicular direction to the Cu-O planes in YBa2Cu3O7-x single-crystal thin films'. Together they form a unique fingerprint.

  • Cite this