Gauge theory of giant phonon magnetic moment in doped Dirac semimetals

被引：0

作者：

Chen, Wenqin ^{[1
,2
,3
]}

Zhang, Xiao-Wei ^{[4
]}

Su, Ying ^{[5
]}

Cao, Ting ^{[4
]}

Xiao, Di ^{[1
,4
]}

Lin, Shi-Zeng ^{[2
,3
,5
]}

机构：

[1] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[2] Los Alamos Natl Lab, Theoret Div, T-4, Los Alamos, NM 87545 USA

[3] Los Alamos Natl Lab, CNLS, Los Alamos, NM 87545 USA

[4] Univ Washington, Dept Mat Sci Engn, Seattle, WA 98195 USA

[5] Los Alamos Natl Lab, Ctr Integrated Nanotechnol CINT, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW B | 2025年 / 111卷 / 03期

关键词：

ELECTRONIC-PROPERTIES; CHIRAL PHONONS; CRYSTAL; STATES;

D O I：

10.1103/PhysRevB.111.035126

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We develop a quantitative theory of phonon magnetic moment in doped Dirac semimetals. Our theory is based on an emergent gauge field approach to the electron-phonon coupling, applicable to gapless systems. We find that the magnetic moment is directly proportional to the electrical Hall conductivity through the phonon Hall viscosity. Our theory is combined with the first-principles calculations, allowing us to quantitatively implement it to realistic materials. Magnetic moments are found to be of the order of a Bohr magneton for Raman-active phonon modes in graphene and Cd3As2. Our results provide practical guidance for the dynamical generation of large magnetization in quantum materials.

引用

页数：11

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