The thermal conductivity of YbRh2Si2 has been measured down to very low temperatures under field in the basal plane. An additional channel for heat transport appears below 30 mK, both in the antiferromagnetic and paramagnetic states, respectively,...
M. L. Sutherland E. C. T. O'Farrell W. H. Toews J. Dunn K. Kuga S. Nakatsuji Y. Machida K. Izawa R. W. Hill
PHYSICAL REVIEW B 92(4) 041114(R) 2015年7月 [査読有り]
We report measurements of in-plane electrical and thermal transport properties in the limit T -> 0 near the unconventional quantum critical point in the heavy-fermion metal beta-YbAlB4. The high Kondo temperature T-K similar or equal to 200 K i...
The de Haas-van Alphen effect, which is a powerful method to explore Fermi surface properties, has been observed in cerium, uranium, and nowadays even in neptunium and plutonium compounds. Here, we present the results of several studies concerning...
Koichi Izawa Yo Machida Atsushi Itoh Yoshitaka So Katsuya Ota Yoshinori Haga Etsuji Yamamoto Noriaki Kimura Yoshichika Onuki Yasumasa Tsutsumi Kazushige Machida
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 83(6) 061013 2014年6月 [査読有り]
We represent our recent advances on the study of the gap symmetry in UPt3 by thermal conductivity tensors kappa(ij) (i, j = x, y, z). The field-angle-resolved thermal conductivity kappa(zz) shows spontaneous twofold symmetry breaking in the gap fu...
Takayuki Isono Daisuke Iguchi Takeshi Matsubara Yo Machida Bernard Salce Jacques Flouquet Hiroki Ogusu Jun-ichi Yamaura Zenji Hiroi Koichi Izawa
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 82(11) 114708 2013年11月 [査読有り]
We develop a physical understanding for how anhamonicity of lattice vibration affects transition temperature, T-c, of superconductivity mediated by phonons, via specific heat measurements on beta-pyrochlore oxide superconductors under high pressur...
人文科学研究科
理学部