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APS » Journals » Phys. Rev. Lett. » Volume 95 » Issue 5
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Phys. Rev. Lett. 95, 057205 (2005) [4 pages]

Spin Current and Magnetoelectric Effect in Noncollinear Magnets

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Hosho Katsura1,*, Naoto Nagaosa1,2,3, and Alexander V. Balatsky4,†
1Department of Applied Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
2CERC, AIST Tsukuba Central 4, Tsukuba 305-8562, Japan
3CREST, Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
4Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

Received 9 December 2004; published 28 July 2005

A new mechanism of the magnetoelectric effect based on the spin supercurrent is theoretically presented in terms of a microscopic electronic model for noncollinear magnets. The electric polarization P⃗ij produced between the two magnetic moments S⃗i and S⃗j is given by P⃗∝e⃗ij×(S⃗i×S⃗j) with e⃗ij being the unit vector connecting the sites i and j. Applications to the spiral spin structure and the gauge theoretical interpretation are discussed.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.057205
DOI:
10.1103/PhysRevLett.95.057205
PACS:
75.80.+q, 71.70.Ej, 77.80.−e

*Electronic address: katsura@appi.t.u-tokyo.ac.jp

†Electronic address: avb@lanl.gov

 
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