Anisotropic s -wave superconductivity in CaAlSi single crystals from penetration depth measurements

Ruslan Prozorov; Tyson A. Olheiser; Russell W. Giannetta; Kentaro Uozato; Tsuyoshi Tamegai

doi:10.1103/PhysRevB.73.184523

Anisotropic s -wave superconductivity in CaAlSi single crystals from penetration depth measurements

Ruslan Prozorov, Tyson A. Olheiser, Russell W. Giannetta, Kentaro Uozato, Tsuyoshi Tamegai

Physics

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

Abstract

In- and out-of-plane London penetration depths were measured in CaAlSi single crystals (Tc =6.2 and 7.3 K) using a tunnel-diode resonator. A full three-dimensional (3D) BCS analysis of the superfluid density is consistent with a prolate spheroidal gap, with a weak-coupling BCS value in the ab plane and stronger coupling along the c axis. The gap anisotropy was found to significantly decrease for higher Tc samples.

Original language	English (US)
Article number	184523
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	73
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.73.184523
State	Published - 2006

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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AU - Giannetta, Russell W.

AU - Uozato, Kentaro

AU - Tamegai, Tsuyoshi

PY - 2006

Y1 - 2006

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AB - In- and out-of-plane London penetration depths were measured in CaAlSi single crystals (Tc =6.2 and 7.3 K) using a tunnel-diode resonator. A full three-dimensional (3D) BCS analysis of the superfluid density is consistent with a prolate spheroidal gap, with a weak-coupling BCS value in the ab plane and stronger coupling along the c axis. The gap anisotropy was found to significantly decrease for higher Tc samples.

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Anisotropic s -wave superconductivity in CaAlSi single crystals from penetration depth measurements

Abstract

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