Adiabatic and nonadiabatic spin torques induced by spin-triplet supercurrent

We study spin transfer torques induced by a spin-triplet supercurrent in a magnet with the superconducting proximity effect. By a perturbative approach, we show that spin-triplet correlations realize new types of torques, which are analogous to the adiabatic and non-adiabatic (\(\beta\)) torques, wi...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2017-09
Main Authors: Takashima, Rina, Fujimoto, Satoshi, Yokoyama, Takehito
Format: Article
Language:English
Subjects:
Adiabatic flow
Damping
Domain walls
Proximity effect (electricity)
Threshold currents
Torque
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We study spin transfer torques induced by a spin-triplet supercurrent in a magnet with the superconducting proximity effect. By a perturbative approach, we show that spin-triplet correlations realize new types of torques, which are analogous to the adiabatic and non-adiabatic (\(\beta\)) torques, without extrinsic spin-flip scattering. Remarkable advantages compared to conventional spin-transfer torques are highlighted in domain wall manipulation. Oscillatory motions of a domain wall do not occur for a small Gilbert damping, and the threshold current density to drive its motion becomes zero in the absence of extrinsic pinning potentials due to the nonadiabatic torque controlled by the triplet correlations.
ISSN:2331-8422
DOI:10.48550/arxiv.1706.02296