Universität zu Köln

Holbein, S., Steffens, P., Finger, T., Komarek, A. C., Sidis, Y., Link, P. and Braden, M. (2015). Field and temperature dependence of electromagnon scattering in TbMnO3 studied by inelastic neutron scattering. Phys. Rev. B, 91 (1). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

Inelastic neutron scattering techniques have been used to study the field-induced multiferroic transition and the temperature dependence of magnetic excitations in TbMnO3. The significant changes in the spin-wave spectra across the field-induced transition perfectly agree with a rotation of the cycloidal spiral plane and with efficient pinning in the commensurate high-field phase. Further analysis of the Q dependence allows the identification of an electromagnon in the multiferroic high-field phase whose energy and polarization precisely matches previous infrared data. This and the zero-field temperature dependence of a zone-center magnon, which exactly agrees with that of an optically detected excitation, document that the inverse Dzyaloshinskii-Moriya interaction induces an electromagnon hybrid excitation in TbMnO3.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Holbein, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Steffens, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Finger, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Komarek, A. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sidis, Y. UNSPECIFIED UNSPECIFIED UNSPECIFIED Link, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Braden, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-414337
DOI:	10.1103/PhysRevB.91.014432
Journal or Publication Title:	Phys. Rev. B
Volume:	91
Number:	1
Date:	2015
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language FERROELECTRICITY Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/41433