Crossover from diffusive to superfluid transport in frustrated magnets

V. M. L. D. P. Goli, Aurelien Manchon

Research output: Contribution to journalArticlepeer-review

Abstract

We investigate the spin transport across the magnetic phase diagram of a frustrated antiferromagnetic insulator and uncover a drastic modification of the transport regime from spin diffusion to spin superfluidity. Adopting a triangular lattice accounting for both nearest-neighbor and next-nearest-neighbor exchange interactions with easy-plane anisotropy, we perform atomistic spin simulations on a two-terminal configuration across the full magnetic phase diagram. We found that as long as the ground state magnetic moments remain in-plane, irrespective of whether the magnetic configuration is ferromagnetic, collinear, or noncollinear antiferromagnetic, the system exhibits spin superfluid behavior with a device output that is independent of the value of the exchange interactions. When the magnetic frustration is large enough to compete with the easy-plane anisotropy and cant the magnetic moments out of the plane, the spin transport progressively evolves towards the diffusive regime. The robustness of spin superfluidity close to magnetic phase boundaries is investigated and we uncover the possibility for proximate spin superfluidity close to the ferromagnetic transition.
Original languageEnglish (US)
JournalPhysical Review B
Volume103
Issue number10
DOIs
StatePublished - Mar 16 2021

Fingerprint Dive into the research topics of 'Crossover from diffusive to superfluid transport in frustrated magnets'. Together they form a unique fingerprint.

Cite this