期刊
NANO LETTERS
卷 18, 期 2, 页码 916-920出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.7b04300
关键词
Edelstein effect; orbital magnetization; chiral crystal; Weyl semimetal
类别
资金
- JSPS KAKENHI [JP16J07354, JP16K13834]
- KAKENHI grant [JP16H00988]
- MEXT Elements Strategy Initiative to Form Core Research Center (TIES)
- [JP17H05179]
- [26103006]
- Grants-in-Aid for Scientific Research [16H00988, 16J07354, 17H05179, 16K13834] Funding Source: KAKEN
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.
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