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

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

Research output: Contribution to journalArticlepeer-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 languageEnglish (US)
Article number184523
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume73
Issue number18
DOIs
StatePublished - 2006

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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