Orbital Edelstein Effect as a Condensed-Matter Analog of Solenoids

被引:100
作者
Yoda, Taiki [1 ]
Yokoyama, Takehito [1 ]
Murakami, Shuichi [1 ,2 ]
机构
[1] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan
[2] Tokyo Inst Technol, TIES, Meguro Ku, Tokyo 1528551, Japan
关键词
Edelstein effect; orbital magnetization; chiral crystal; Weyl semimetal; BERRY-PHASE; CONDUCTION ELECTRONS; SPIN POLARIZATION; CRYSTALS; TELLURIUM; DYNAMICS; SYSTEMS;
D O I
10.1021/acs.nanolett.7b04300
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We theoretically study current-induced orbital magnetization in a chiral crystal. This phenomenon is an orbital version of the Edelstein effect. We propose an analogy between the current-induced orbital magnetization and an Ampere field in a solenoid in classical electrodynamics. To quantify this effect, we define a dimensionless parameter from the response coefficients relating a current density with an orbital magnetization. This dimensionless parameter can be regarded as a number of turns within a unit cell when the crystal is regarded as a solenoid, and it represents how "chiral" the crystal is. By focusing on the dimensionless parameter, one can design a band structure that realizes the induction of large orbital magnetization. In particular, a Weyl semimetal with all of the Weyl nodes close to the Fermi energy can have a large value for this dimensionless parameter, which can exceed that of a classical solenoid.
引用
收藏
页码:916 / 920
页数:5
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