A change of the Fermi surface in UGe2 across the critical pressure

被引：59

作者：

Settai, R ^{[1
]}

Nakashima, M

Araki, S

Haga, Y

Kobayashi, TC

Tateiwa, N

Yamagami, H

Onuki, Y

机构：

[1] Osaka Univ, Grad Sch Sci, Osaka 5600043, Japan

[2] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Ibaraki 3191195, Japan

[3] Osaka Univ, Res Ctr Mat Sci Extreme Condit, Osaka 5608531, Japan

[4] Osaka Univ, Grad Sch Engn Sci, Osaka 5608531, Japan

[5] Kyoto Sangyo Univ, Dept Phys, Fac Sci, Kita Ku, Kyoto 6038555, Japan

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2002年 / 14卷 / 01期

关键词：

D O I：

10.1088/0953-8984/14/1/104

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We carried out the de Haas-van Alphen (dHvA) experiment under pressure for a ferromagnet UGe2. The dHvA frequency of a main dHvA branch named a, that corresponds to a majority up-spin band 40-hole Fermi surface, decreases monotonously with increasing pressure, but in the pressure range from p(c)* (similar or equal to1.2 GPa) to p(c) (similar or equal to1.5 GPa) the dHvA signal disappears completely, where p(c) and p(c)* correspond to critical pressures for a Curie temperature T-C and the C second phase transition temperature T* (<T-C), respectively. For p > p(c) we observed new dHvA branches with large cyclotron masses of 19-64m(0), which correspond to main Fermi surfaces in the paramagnetic state.

引用

页码：L29 / L36

页数：8

共 19 条

[1] UGe2:: A ferromagnetic spin-triplet superconductor -: art. no. 144519 [J].