Penetration depth study of LaOs4Sb12 : multiband s-wave superconductivity

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...

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Main Authors:	Panagopoulos, Christos, Tee, X. Y., Luo, H. G., Xiang, T., Vandervelde, D., Salamon, M. B., Sugawara, H., Sato, H., Chia, Elbert E. M.
Other Authors:	School of Physical and Mathematical Sciences
Format:	Article
Language:	English
Published:	2013
Subjects:	DRNTU::Science::Physics::Electricity and magnetism
Online Access:	https://hdl.handle.net/10356/95111 http://hdl.handle.net/10220/9243
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Institution:	Nanyang Technological University
Language:	English

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spelling	sg-ntu-dr.10356-951112023-02-28T19:39:06Z Penetration depth study of LaOs4Sb12 : multiband s-wave superconductivity Panagopoulos, Christos Tee, X. Y. Luo, H. G. Xiang, T. Vandervelde, D. Salamon, M. B. Sugawara, H. Sato, H. Chia, Elbert E. M. School of Physical and Mathematical Sciences DRNTU::Science::Physics::Electricity and magnetism 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. Published version 2013-02-25T05:03:07Z 2019-12-06T19:08:27Z 2013-02-25T05:03:07Z 2019-12-06T19:08:27Z 2012 2012 Journal Article 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-. https://hdl.handle.net/10356/95111 http://hdl.handle.net/10220/9243 10.1103/PhysRevB.86.064518 en Physical review B © 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: [http://dx.doi.org/10.1103/PhysRevB.86.064518]. 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. application/pdf
institution	Nanyang Technological University
building	NTU Library
continent	Asia
country	Singapore Singapore
content_provider	NTU Library
collection	DR-NTU
language	English
topic	DRNTU::Science::Physics::Electricity and magnetism
spellingShingle	DRNTU::Science::Physics::Electricity and magnetism Panagopoulos, Christos Tee, X. Y. Luo, H. G. Xiang, T. Vandervelde, D. Salamon, M. B. Sugawara, H. Sato, H. Chia, Elbert E. M. Penetration depth study of LaOs4Sb12 : multiband s-wave superconductivity
description	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.
author2	School of Physical and Mathematical Sciences
author_facet	School of Physical and Mathematical Sciences Panagopoulos, Christos Tee, X. Y. Luo, H. G. Xiang, T. Vandervelde, D. Salamon, M. B. Sugawara, H. Sato, H. Chia, Elbert E. M.
format	Article
author	Panagopoulos, Christos Tee, X. Y. Luo, H. G. Xiang, T. Vandervelde, D. Salamon, M. B. Sugawara, H. Sato, H. Chia, Elbert E. M.
author_sort	Panagopoulos, Christos
title	Penetration depth study of LaOs4Sb12 : multiband s-wave superconductivity
title_short	Penetration depth study of LaOs4Sb12 : multiband s-wave superconductivity
title_full	Penetration depth study of LaOs4Sb12 : multiband s-wave superconductivity
title_fullStr	Penetration depth study of LaOs4Sb12 : multiband s-wave superconductivity
title_full_unstemmed	Penetration depth study of LaOs4Sb12 : multiband s-wave superconductivity
title_sort	penetration depth study of laos4sb12 : multiband s-wave superconductivity
publishDate	2013
url	https://hdl.handle.net/10356/95111 http://hdl.handle.net/10220/9243
_version_	1759853713344692224

Penetration depth study of LaOs4Sb12 : multiband s-wave superconductivity

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