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Article overview
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Conserved current of nonconserved quantities | Cong Xiao
; Qian Niu
; | Date: |
25 Sep 2020 | Abstract: | We provide a unified semiclassical theory for the conserved current of
locally nonconserved quantities. The attained current vanishes and circulates
in uniform and nonuniform equilibrium systems, respectively, thus can be used
to characterize the corresponding orbital magnetization and transport of
nonconserved quantities. We manifest the theory in two entirely different
physical contexts: the spin transport of Bloch electrons and the charge orbital
magnetization in superconductors. Several longstanding puzzles that enormously
limit the playground of the conserved spin current of electrons are solved,
paving the way for material related studies. A Berry phase formula is
established for the orbital magnetization in unconventional pairing
superconductors, consisting of both the localized and global charge circuits of
bogolons. | Source: | arXiv, 2009.12058 | Services: | Forum | Review | PDF | Favorites |
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