Structural-transition-induced quasi-two-dimensional Fermi surface in FeSe

被引：11

作者：

Sun, Yue ^{[1
]}

Yamada, Tatsuhiro ^{[1
]}

Pyon, Sunseng ^{[1
]}

Tamegai, Tsuyoshi ^{[1
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 13期

基金：

日本学术振兴会;

关键词：

ANGLE-DEPENDENT MAGNETORESISTANCE; TOPOLOGICAL INSULATOR; SUPERCONDUCTIVITY; NEMATICITY; PRESSURE; PHASE;

D O I：

10.1103/PhysRevB.94.134505

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report detailed study of angular-dependent magnetoresistance (AMR) with tilting angle theta from c axis ranging from 0 degrees to 360 degrees on a high-quality FeSe single crystal. A pronounced AMR with twofold symmetry is observed, which is caused by the quasi-two-dimensional (quasi-2D) Fermi surface. The pronounced AMR is observed only in the orthorhombic phase, indicating that the quasi-2D Fermi surface is induced by the structural transition. Details about the influence of the multiband effect to the AMR are also discussed. Besides, the angular response of a possible Dirac-cone-like band structure is investigated by analyzing the detailed magnetoresistance at different theta. The obtained characteristic field (B*) can be also roughly scaled in the 2D approximation, which indicates that the Dirac-cone-like state is also 2D in nature.

引用

页数：6

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