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

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

2006-02-27

arxiv.org/abs/cond-mat/0602635v2

Phys. Rev. B 73, 184523 (2006)

Physics

Condensed Matter

Superconductivity

4 pages

Scientific paper

10.1103/PhysRevB.73.184523

In- and out-of-plane London penetration depths were measured in single crystals CaAlSi (T_{c}=6.2 K and 7.3 K) using a tunnel-diode resonator. A full 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 T_{c} samples.

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