TY - JOUR
T1 - Searching for the in-plane anisotropy of the specific heat of UPt 3 in rotating fields
AU - Kittaka, S.
AU - An, K.
AU - Sakakibara, T.
AU - Haga, Y.
AU - Yamamoto, E.
AU - Kimura, N.
AU - Onuki, Y.
AU - Machida, K.
PY - 2012
Y1 - 2012
N2 - 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 [0001] 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.
AB - 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 [0001] 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.
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U2 - 10.1088/1742-6596/391/1/012031
DO - 10.1088/1742-6596/391/1/012031
M3 - Conference article
AN - SCOPUS:84874154907
SN - 1742-6588
VL - 391
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012031
T2 - International Conference on Strongly Correlated Electron Systems, SCES 2011
Y2 - 29 August 2011 through 3 September 2011
ER -