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

doi:10.1103/PhysRevB.35.7220

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

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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 language	English
Pages (from-to)	7220-7223
Number of pages	4
Journal	Physical Review B
Volume	35
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.35.7220
State	Published - 1987

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Condensed Matter Physics

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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.",

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AU - Pan, S.

AU - Ng, K. W.

AU - De Lozanne, A. L.

AU - Tarascon, J. M.

AU - Greene, L. H.

PY - 1987

Y1 - 1987

N2 - 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.

AB - 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.

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

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