Non-Fermi Liquid State Bounded by a Possible Electronic Topological Transition in ZrZn2

被引：27

作者：

Kabeya, Noriyuki ^{[1
,2
]}

Maekawa, Hirotaka ^{[1
]}

Deguchi, Kazuhiko ^{[1
]}

Kimura, Noriaki ^{[2
]}

Aoki, Haruyoshi ^{[2
]}

Sato, Noriaki K. ^{[1
]}

机构：

[1] Nagoya Univ, Grad Sch Sci, Dept Phys, Nagoya, Aichi 4648602, Japan

[2] Tohoku Univ, Dept Phys, Grad Sch Sci, Sendai, Miyagi 9808578, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2012年 / 81卷 / 07期

关键词：

ZrZn2; Lifshitz transition; metamagnetism; non-Fermi liquid; electronic topological transition; QUANTUM PHASE-TRANSITIONS; HIGH-PRESSURE; METAL; MNSI; BREAKDOWN; FIELDS; ORDER;

D O I：

10.1143/JPSJ.81.073706

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report high-precision magnetic and transport measurements of ZrZn2 and present a phase diagram as a function of pressure and magnetic field. The paramagnetic phase is found to be divided into two regions at T similar or equal to 0 by a possible electronic topological transition (i.e., a non-symmetry breaking transition) known as the Lifshitz transition, and the two regions are characterized by Fermi and non-Fermi liquid behaviors. These results strongly suggest that the non-Fermi liquid state exists as a stable phase distinguished from the Fermi liquid by the Fermi surface topology. As a possible origin of the non-Fermi liquid behavior, an antiferromagnetic fluctuation arising from the Fermi surface nesting is discussed.

引用

页数：4

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