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- Publisher Website: 10.1103/PhysRevB.104.L241411
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Article: Conserved current of nonconserved quantities
Title | Conserved current of nonconserved quantities |
---|---|
Authors | |
Issue Date | 2021 |
Publisher | American Physical Society. The Journal's web site is located at http://journals.aps.org/prb/ |
Citation | Physical Review B: covering condensed matter and materials physics, 2021, v. 104 n. 24, article no. L241411 How to Cite? |
Abstract | We provide a unified semiclassical theory for the conserved current of nonconserved quantities, and manifest it in two physical contexts: the spin current of Bloch electrons and the charge current of mean-field Bogoliubov quasiparticles. We reveal that the previously overlooked torque quadrupole density and Berry phase correction to the torque dipole density are essential to assure a circulating spin current with null net flow at equilibrium. The band geometric origin of spin transport is ascertained to be the momentum space Berry curvature instead of the spin Berry curvature, paving the way for material related studies. In superconductors the attained conserved charge current corresponds to the quasiparticle charge current renormalized by the condensate backflow. Its circulation at equilibrium gives an orbital magnetization, which involves the characteristics of superconductivity, such as the Berry curvature arising from unconventional pairing and an orbital magnetic moment induced by the charge dipole of moving quasiparticles. |
Persistent Identifier | http://hdl.handle.net/10722/310130 |
ISSN | 2023 Impact Factor: 3.2 2023 SCImago Journal Rankings: 1.345 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Xiao, C | - |
dc.contributor.author | Niu, Q | - |
dc.date.accessioned | 2022-01-24T02:24:17Z | - |
dc.date.available | 2022-01-24T02:24:17Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Physical Review B: covering condensed matter and materials physics, 2021, v. 104 n. 24, article no. L241411 | - |
dc.identifier.issn | 2469-9950 | - |
dc.identifier.uri | http://hdl.handle.net/10722/310130 | - |
dc.description.abstract | We provide a unified semiclassical theory for the conserved current of nonconserved quantities, and manifest it in two physical contexts: the spin current of Bloch electrons and the charge current of mean-field Bogoliubov quasiparticles. We reveal that the previously overlooked torque quadrupole density and Berry phase correction to the torque dipole density are essential to assure a circulating spin current with null net flow at equilibrium. The band geometric origin of spin transport is ascertained to be the momentum space Berry curvature instead of the spin Berry curvature, paving the way for material related studies. In superconductors the attained conserved charge current corresponds to the quasiparticle charge current renormalized by the condensate backflow. Its circulation at equilibrium gives an orbital magnetization, which involves the characteristics of superconductivity, such as the Berry curvature arising from unconventional pairing and an orbital magnetic moment induced by the charge dipole of moving quasiparticles. | - |
dc.language | eng | - |
dc.publisher | American Physical Society. The Journal's web site is located at http://journals.aps.org/prb/ | - |
dc.relation.ispartof | Physical Review B: covering condensed matter and materials physics | - |
dc.rights | Copyright 2021 by The American Physical Society. This article is available online at https://doi.org/10.1103/PhysRevB.104.L241411. | - |
dc.title | Conserved current of nonconserved quantities | - |
dc.type | Article | - |
dc.identifier.email | Xiao, C: congxiao@hku.hk | - |
dc.identifier.authority | Xiao, C=rp02922 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1103/PhysRevB.104.L241411 | - |
dc.identifier.scopus | eid_2-s2.0-85121997103 | - |
dc.identifier.hkuros | 331450 | - |
dc.identifier.volume | 104 | - |
dc.identifier.issue | 24 | - |
dc.identifier.spage | article no. L241411 | - |
dc.identifier.epage | article no. L241411 | - |
dc.identifier.isi | WOS:000737276900007 | - |
dc.publisher.place | United States | - |