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

Superconductivity 2007-05-23 v2

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

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Abstract

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.

Keywords

penetration depth superfluid density gap anisotropy CaAlSi s-wave superconductivity BCS theory

Cite

@article{arxiv.cond-mat/0602635,
  title  = {Anisotropic s-wave superconductivity in single crystals CaAlSi from penetration depth measurements},
  author = {Ruslan Prozorov and Tyson A. Olheiser and Russell W. Giannetta and Kentaro Uozato and Tsuyoshi Tamegai},
  journal= {arXiv preprint arXiv:cond-mat/0602635},
  year   = {2007}
}

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