We have studied the Fermi surface and the cyclotron mass of a semimetallic heavy fermion compound YbAs both in the antiferromagnetic state and the paramagnetic state. We have found the Fermi surface of three ellipsoidal electron surfaces and one spherical hole surface, and that the shape of these Fermi surfaces is the same in both states. In addition, we have found that the temperature dependence of the dHvA oscillatory amplitudes change anomalously at the Néel temperature. This anomaly is ascribed to the change of the cyclotron mass and the Dingle temperature at the Néel temperature. To explain the large electronic specific heat coefficient, the extremely heavy hole surface with about 103 m0 should exist.
|Number of pages||5|
|Journal||Journal of the Physical Society of Japan|
|Publication status||Published - 1993 Jun|
- De Haas-van Alphen effect
- Heavy fermion
ASJC Scopus subject areas
- Physics and Astronomy(all)