Magnon trap by chiral spin pumping

Tao Yu, Hanchen Wang, Michael A. Sentef, Haiming Yu, Gerrit E.W. Bauer

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


Chiral spin pumping is the generation of a unidirectional spin current in half of ferromagnetic films or conductors by dynamic dipolar stray fields from close-by nanomagnets. We formulate a general theory of long-range chiral interactions between magnets mediated by unidirectional traveling waves, e.g., spin waves in a magnetic film or microwaves in a waveguide. The traveling waves emitted by an excited magnet can be perfectly trapped by a second, initially passive magnet by a dynamical interference effect. When both magnets are excited by a uniform microwave, the chiral interaction between them creates a large imbalance in their magnon numbers.

Original languageEnglish
Article number054429
JournalPhysical Review B
Issue number5
Publication statusPublished - 2020 Aug 1


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