Take a sneak peek at the new NIST.gov and let us know what you think!
(Please note: some content may not be complete on the beta site.).

View the beta site
NIST logo

Publication Citation: Chirality from interfacial spin-orbit coupling effects in magnetic bilayers

NIST Authors in Bold

Author(s): Kyoung-Whan Kim; Hyun-Woo Lee; Kyung Jin Lee; Mark D. Stiles;
Title: Chirality from interfacial spin-orbit coupling effects in magnetic bilayers
Published: November 19, 2013
Abstract: Spin-orbit coupling causes many properties that make magnets technologically important as well as properties that interfere with optimal performance. As nanomagnetic devices scale to smaller sizes, spin-orbit coupling due to the broken structural inversion symmetry at interfaces becomes increasingly important. Here we use a minimal two-dimensional model of itinerant electrons near the interface to show that the interfacial spin-orbit coupling generates chiral effects such as the interfacial Dzyaloshinskii-Moriya interaction, chiral spin torques, and spin-dependent chiral electromagnetic fields. All these effects are mutually correlated and are related through a curved space description. The latter reveals the frustration in magnetic ground state. In magnetic bilayers, these chiral effects lead to very efficient current-induced magnetization dynamics. Such effects may also be relevant for high-mobility two-dimensional electron gas at the interface between insulating oxides.
Citation: Physical Review Letters
Volume: 111
Issue: 21
Keywords: Spintronics, magnetic dynamics, spin-orbit coupling, Rashba interaction, itinerant electrons, Dzyaloshinskii-Moriya interaction, Chirality, magnetic bilayers
Research Areas: Nanomagnetics
DOI: http://dx.doi.org/10.1103/PhysRevLett.111.21  (Note: May link to a non-U.S. Government webpage)
PDF version: PDF Document Click here to retrieve PDF version of paper (920KB)