Sheet superconductivity in twin walls: experimental evidence of
- 8 June 1998
- journal article
- letter
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 10 (22) , L377-L380
- https://doi.org/10.1088/0953-8984/10/22/003
Abstract
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 .Keywords
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