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Temperature dependence of the magnetic penetration depth in BKBO superconductor

Alexey Snezhko·Ruslan Prozorov
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Abstract

Temperature dependence of the magnetic penetration depth, $λ$(T), was measured in the Meissner state in single crystals B$_{1-x}$K$_{x}$BiO$_{3}$ (x=0.37) using tunnel diode resonator technique. At low temperatures, $0.013 \le T/T_c \le 0.4$, $λ$(T) is exponentially flat, which provides a strong evidence for conventional s-wave BCS behavior. Numerical analysis of the data rules out the possibility of a gap with nodes.

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Alexey Snezhko, Ruslan Prozorov. 2003-12-12. Temperature dependence of the magnetic penetration depth in BKBO superconductor. https://doi.org/10.1016/j.physc.2003.12.007

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