Measurements of the superconducting gap of La-Sr-Cu-O with a scanning-tunneling microscope

S. Pan, K. W. Ng, A. L. De Lozanne, J. M. Tarascon, L. H. Greene

Research output: Contribution to journalArticle

Abstract

We report the first tunneling measurements made on the new high-transition-temperature perovskite superconductors. These were obtained using an ultrahigh-vacuum low-temperature scanning-tunneling microscope. The superconducting gap of a La1.85Sr0.15CuO4-y sample is 123 mV, and the onset Tc is 40 K, from which 2/kBTc=72. The possibility that this surprisingly high ratio may be due to a mechanism other than superconductivity is discussed.

Original languageEnglish (US)
Pages (from-to)7220-7223
Number of pages4
JournalPhysical Review B
Volume35
Issue number13
DOIs
StatePublished - Jan 1 1987

ASJC Scopus subject areas

  • Condensed Matter Physics

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    Pan, S., Ng, K. W., De Lozanne, A. L., Tarascon, J. M., & Greene, L. H. (1987). Measurements of the superconducting gap of La-Sr-Cu-O with a scanning-tunneling microscope. Physical Review B, 35(13), 7220-7223. https://doi.org/10.1103/PhysRevB.35.7220