Energy gap and korringa constant in the high-temperature superconductor La1.83Sr0.17CuO4 determined by NMR

M. Lee, M. Yudkowsky, W. P. Halperin, J. Thiel, S. J. Hwu, Kenneth R Poeppelmeier

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Polycrystalline samples of La1.83Sr0.17CuO4 were studied by pulsed nuclear-magnetic-resonance methods on the copper nucleus over a temperature range which included both normal and superconducting phases. A Korringa constant 14"1 K sec and a minimum value for the energy gap 2 kBTc=1.3"0.2 were found. A comparison of these results with the larger gap reported from infrared absorption and from tunneling experiments indicates that there is substantial anisotropy in the pairing interaction. Homogeneous line narrowing in the superconducting state was observed.

Original languageEnglish
Pages (from-to)2378-2381
Number of pages4
JournalPhysical Review B
Volume36
Issue number4
DOIs
Publication statusPublished - 1987

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High temperature superconductors
Infrared absorption
high temperature superconductors
infrared absorption
Copper
Energy gap
Anisotropy
Nuclear magnetic resonance
copper
nuclear magnetic resonance
anisotropy
nuclei
Experiments
interactions
Temperature
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Energy gap and korringa constant in the high-temperature superconductor La1.83Sr0.17CuO4 determined by NMR. / Lee, M.; Yudkowsky, M.; Halperin, W. P.; Thiel, J.; Hwu, S. J.; Poeppelmeier, Kenneth R.

In: Physical Review B, Vol. 36, No. 4, 1987, p. 2378-2381.

Research output: Contribution to journalArticle

Lee, M. ; Yudkowsky, M. ; Halperin, W. P. ; Thiel, J. ; Hwu, S. J. ; Poeppelmeier, Kenneth R. / Energy gap and korringa constant in the high-temperature superconductor La1.83Sr0.17CuO4 determined by NMR. In: Physical Review B. 1987 ; Vol. 36, No. 4. pp. 2378-2381.
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AU - Hwu, S. J.

AU - Poeppelmeier, Kenneth R

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AB - Polycrystalline samples of La1.83Sr0.17CuO4 were studied by pulsed nuclear-magnetic-resonance methods on the copper nucleus over a temperature range which included both normal and superconducting phases. A Korringa constant 14"1 K sec and a minimum value for the energy gap 2 kBTc=1.3"0.2 were found. A comparison of these results with the larger gap reported from infrared absorption and from tunneling experiments indicates that there is substantial anisotropy in the pairing interaction. Homogeneous line narrowing in the superconducting state was observed.

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