Spin-motive force and orbital-motive force: from magnon BEC to chiral Weyl superfluids

Abstract

Spin-motive geometric force acting on electrons in metallic ferromagnets is extended to spin-motive force in magnon BEC, which is represented by phase-coherent precession of magnetization, and to the orbital-motive force in superfluid 3He-A. In 3He-A there are two contributions to the orbital-motive force. One of them comes from the chiral nature of this liquid. Another one originates from chiral Weyl fermions living in the vicinity of the topologically protected Weyl points, and is related to the phenomenon of chiral anomaly.

4 pages, JETP Letters style, no figures, references added, version submitted to JETP Letters

References in corpus (4)

• Berry Curvature, Triangle Anomalies, and the Chiral Magnetic Effect in Fermi Liquids
• Kinetic theory with Berry curvature from quantum field theories
• Surface States, Edge Currents and the Angular Momentum of Chiral p-wave Superfluids
• Chirality of superfluid 3He-A

Cited by in corpus (4)

• Kinetic equations for massive Dirac fermions in electromagnetic field with non-Abelian Berry phase
• Spin-motive force due to domain wall motion in the presence of Dzyaloshinskii-Moriya Interaction
• Hydrodynamic description of Weyl fermions in condensed state of matter
• Emergent impedance due to antiferromagnetic domain wall dynamics