Universität zu Köln

Freimuth, Frank ORCID: 0000-0001-6193-5991, Bamler, Robert ORCID: 0000-0002-3135-8107, Mokrousov, Yuriy ORCID: 0000-0003-1072-2421 and Rosch, Achim ORCID: 0000-0002-6586-5721 (2013). Phase-space Berry phases in chiral magnets: Dzyaloshinskii-Moriya interaction and the charge of skyrmions. Phys. Rev. B, 88 (21). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1550-235X

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Abstract

The semiclassical motion of electrons in phase space x = (R, k) is influenced by Berry phases described by a six-component vector potential A = (A(R), A(k)). In chiral magnets, Dzyaloshinskii-Moriya (DM) interactions induce slowly varying magnetic textures (helices and skyrmion lattices) for which all components of A are important, inducing effectively a curvature in mixed position and momentum space. We show that for smooth textures and weak spin-orbit coupling, phase-space Berry curvatures determine the DM interactions and give important contributions to the charge. Using ab initio methods, we calculate the strength of DM interactions in MnSi in good agreement with experiment and estimate the charge of skyrmions.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Freimuth, Frank UNSPECIFIED orcid.org/0000-0001-6193-5991 UNSPECIFIED Bamler, Robert UNSPECIFIED orcid.org/0000-0002-3135-8107 UNSPECIFIED Mokrousov, Yuriy UNSPECIFIED orcid.org/0000-0003-1072-2421 UNSPECIFIED Rosch, Achim UNSPECIFIED orcid.org/0000-0002-6586-5721 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-470172
DOI:	10.1103/PhysRevB.88.214409
Journal or Publication Title:	Phys. Rev. B
Volume:	88
Number:	21
Date:	2013
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	1550-235X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LOCALIZED WANNIER FUNCTIONS; WEAK FERROMAGNETISM; QUANTUM; EXCITATIONS; CRYSTAL; DENSITY; METALS Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/47017