In order to identify the gap structure of a spin-triplet superconductor UPt3, we performed field-angle-resolved specific heat (Cφ) measurements in a magnetic field rotated around the  axis. Although various theories predict fourfold symmetry of the gap in the superconducting C phase, we observed no angular variation in Cφ in a temperature range down to 88 mK (∼ 0.17Tc). This absence of the variation in Cφ implies that the field-angle-dependent quasiparticle excitations, reflecting the gap anisotropy, are averaged out in the bulk of UPt3.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2012|
|Event||International Conference on Strongly Correlated Electron Systems, SCES 2011 - Cambridge, United Kingdom|
Duration: 2011 Aug 29 → 2011 Sep 3
ASJC Scopus subject areas
- Physics and Astronomy(all)