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) |
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Article number | 184523 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 73 |
Issue number | 18 |
DOIs | |
State | Published - 2006 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics