Sheet superconductivity in twin walls: experimental evidence of
Alison Aird; Ekhard K H Salje; Alison Aird; IRC in Superconductivity and Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK; Ekhard K H Salje; IRC in Superconductivity and Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK
Журнал:
Journal of Physics: Condensed Matter
Дата:
1998-06-08
Аннотация:
Single crystals of that contain ferroelastic twin walls have been chemically deoxygenated using a gas transport reaction with Na vapour. The reaction product consists of a non-superconducting matrix of tetragonal and superconducting twin boundaries. The superconducting transition temperature is 3 K. The upper critical field has been measured; its temperature dependence shows BCS type behaviour at T < 2.5 K and a weak tail near .
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