Temperature dependence of the positron annihilation lifetime in single-crystal YBa2Cu3O7

D. R. Harshman, Lynn Schneemeyer, J. V. Waszczak, Y. C. Jean, M. J. Fluss, R. H. Howell, A. L. Wachs

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Abstract

We report our measurements of the temperature dependence of the positron lifetime spectrum in single-crystal YBa2Cu3O7. Contrary to earlier measurements in sintered powders, we observe only a single lifetime component for temperatures in the range 5<T<297 K, exhibiting a constant value (176 ps) above Tc and increasing monotonically below Tc to 187 ps at 5 K. Possible correlations with the superconducting gap, relaxation of the oxygen atoms, or a redistribution of the electrons are discussed.

Original languageEnglish
Pages (from-to)848-851
Number of pages4
JournalPhysical Review B
Volume38
Issue number1
DOIs
StatePublished - 1 Jan 1988

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Positron annihilation
positron annihilation
Single crystals
life (durability)
temperature dependence
single crystals
Positrons
Powders
oxygen atoms
positrons
Oxygen
Atoms
Temperature
Electrons
electrons
temperature
barium copper yttrium oxide

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Harshman, D. R., Schneemeyer, L., Waszczak, J. V., Jean, Y. C., Fluss, M. J., Howell, R. H., & Wachs, A. L. (1988). Temperature dependence of the positron annihilation lifetime in single-crystal YBa2Cu3O7. Physical Review B, 38(1), 848-851. https://doi.org/10.1103/PhysRevB.38.848
Harshman, D. R. ; Schneemeyer, Lynn ; Waszczak, J. V. ; Jean, Y. C. ; Fluss, M. J. ; Howell, R. H. ; Wachs, A. L. / Temperature dependence of the positron annihilation lifetime in single-crystal YBa2Cu3O7. In: Physical Review B. 1988 ; Vol. 38, No. 1. pp. 848-851.
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Harshman, DR, Schneemeyer, L, Waszczak, JV, Jean, YC, Fluss, MJ, Howell, RH & Wachs, AL 1988, 'Temperature dependence of the positron annihilation lifetime in single-crystal YBa2Cu3O7', Physical Review B, vol. 38, no. 1, pp. 848-851. https://doi.org/10.1103/PhysRevB.38.848

Temperature dependence of the positron annihilation lifetime in single-crystal YBa2Cu3O7. / Harshman, D. R.; Schneemeyer, Lynn; Waszczak, J. V.; Jean, Y. C.; Fluss, M. J.; Howell, R. H.; Wachs, A. L.

In: Physical Review B, Vol. 38, No. 1, 01.01.1988, p. 848-851.

Research output: Contribution to journalArticleResearchpeer-review

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AB - We report our measurements of the temperature dependence of the positron lifetime spectrum in single-crystal YBa2Cu3O7. Contrary to earlier measurements in sintered powders, we observe only a single lifetime component for temperatures in the range 5<T<297 K, exhibiting a constant value (176 ps) above Tc and increasing monotonically below Tc to 187 ps at 5 K. Possible correlations with the superconducting gap, relaxation of the oxygen atoms, or a redistribution of the electrons are discussed.

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