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Article overview
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Thermal generation of magnetization via orbital degree of freedom in low-symmetry two dimensional systems | Cong Xiao
; Qian Niu
; | Date: |
5 Feb 2020 | Abstract: | We propose an orbital magnetothermal effect wherein the temperature gradient
generates an out-of-plane orbital magnetization of Bloch electrons in
low-symmetry two-dimensional (2D) systems. We provide the hitherto absent
theoretical approach to attaining the linear thermoelectric responses of the
orbital magnetization, which does not correspond to a single-particle operator
in extended-state systems thus is hard to fit into the linear response theory.
The Mott relation is extended to such thermoelectric responses. The different
symmetry requirements and temperature dependencies of intrinsic and extrinsic
responses are elucidated. Besides, we propose a phonon-drag orbital
magnetization and point out the presence of a peak in its temperature
dependence. These results are relevant to various 2D systems with reduced
symmetry, opening the door to thermal generation and control of magnetization
via the orbital degree of freedom. | Source: | arXiv, 2002.1637 | Services: | Forum | Review | PDF | Favorites |
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