μ SR measurements on the vortex lattice of CaAlSi: Anisotropic response in magnetic penetration depth

S. Kuroiwa; K. H. Satoh; A. Koda; R. Kadono; K. Ohishi; W. Higemoto; J. Akimitsu

doi:10.1016/j.jpcs.2007.08.048

μ SR measurements on the vortex lattice of CaAlSi: Anisotropic response in magnetic penetration depth

S. Kuroiwa, K. H. Satoh, A. Koda, R. Kadono, K. Ohishi, W. Higemoto, J. Akimitsu

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The vortex state defined by two characteristic length scales, magnetic penetration depth (λ) and coherence length (ξ), in a layered hexagonal superconductor CaAlSi was probed using muon spin rotation. From preliminary analysis using modified London model, we found that the in-plane λ increases with increasing magnetic field while inter-plane λ is almost independent of magnetic field. The presence of field-induced quasiparticle excitation manifested in the field dependence of λ suggests that CaAlSi has an anisotropic gap structure (nodes/dips or multi-gapped).

Original language	English
Pages (from-to)	2124-2128
Number of pages	5
Journal	Journal of Physics and Chemistry of Solids
Volume	68
Issue number	11
DOIs	https://doi.org/10.1016/j.jpcs.2007.08.048
Publication status	Published - Nov 1 2007
Externally published	Yes

Keywords

A. Superconductors

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "μ SR measurements on the vortex lattice of CaAlSi: Anisotropic response in magnetic penetration depth",

abstract = "The vortex state defined by two characteristic length scales, magnetic penetration depth (λ) and coherence length (ξ), in a layered hexagonal superconductor CaAlSi was probed using muon spin rotation. From preliminary analysis using modified London model, we found that the in-plane λ increases with increasing magnetic field while inter-plane λ is almost independent of magnetic field. The presence of field-induced quasiparticle excitation manifested in the field dependence of λ suggests that CaAlSi has an anisotropic gap structure (nodes/dips or multi-gapped).",

keywords = "A. Superconductors",

author = "S. Kuroiwa and Satoh, {K. H.} and A. Koda and R. Kadono and K. Ohishi and W. Higemoto and J. Akimitsu",

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T2 - Anisotropic response in magnetic penetration depth

AU - Kuroiwa, S.

AU - Satoh, K. H.

AU - Koda, A.

AU - Kadono, R.

AU - Ohishi, K.

AU - Higemoto, W.

AU - Akimitsu, J.

PY - 2007/11/1

Y1 - 2007/11/1

N2 - The vortex state defined by two characteristic length scales, magnetic penetration depth (λ) and coherence length (ξ), in a layered hexagonal superconductor CaAlSi was probed using muon spin rotation. From preliminary analysis using modified London model, we found that the in-plane λ increases with increasing magnetic field while inter-plane λ is almost independent of magnetic field. The presence of field-induced quasiparticle excitation manifested in the field dependence of λ suggests that CaAlSi has an anisotropic gap structure (nodes/dips or multi-gapped).

AB - The vortex state defined by two characteristic length scales, magnetic penetration depth (λ) and coherence length (ξ), in a layered hexagonal superconductor CaAlSi was probed using muon spin rotation. From preliminary analysis using modified London model, we found that the in-plane λ increases with increasing magnetic field while inter-plane λ is almost independent of magnetic field. The presence of field-induced quasiparticle excitation manifested in the field dependence of λ suggests that CaAlSi has an anisotropic gap structure (nodes/dips or multi-gapped).

KW - A. Superconductors

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