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Title: Penetration depth study of LaOs4Sb12 : multiband s-wave superconductivity
Authors: Panagopoulos, Christos
Tee, X. Y.
Luo, H. G.
Xiang, T.
Vandervelde, D.
Salamon, M. B.
Sugawara, H.
Sato, H.
Chia, Elbert E. M.
Keywords: DRNTU::Science::Physics::Electricity and magnetism
Issue Date: 2012
Source: Tee, X. Y., Luo, H. G., Xiang, T., Vandervelde, D., Salamon, M. B., Sugawara, H., et al. (2012). Penetration depth study of LaOs4Sb12 : multiband s-wave superconductivity. Physical Review B, 86(6), 064518-.
Series/Report no.: Physical review B
Abstract: We measured the magnetic penetration depth λ(T) in single crystals of LaOs4Sb12 (Tc=0.74 K) down to 85 mK using a tunnel-diode-oscillator technique. The observed low-temperature exponential dependence indicates an s-wave gap. Fitting the low-temperature data to a BCS s-wave expression gives the zero-temperature gap value Δ(0)=(1.34±0.07)kBTc which is significantly smaller than the BCS value of 1.76kBTc. In addition, the normalized superfluid density ρ(T) shows an unusually long suppression near Tc and is best fit by a two-band s-wave model.
DOI: 10.1103/PhysRevB.86.064518
Rights: © 2012 American Physical Society. This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at the following official DOI: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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