Open AccessLattice Dynamics of EuO: Evidence for Giant Spin-Phonon Coupling
Author(s) -
Ramu Pradip,
Przemysław Piekarz,
A. Bosak,
D. G. Merkel,
Olga Waller,
A. Seiler,
A. I. Chumakov,
R. Rüffer,
Andrzej M. Oleś,
K. Parliński,
M. Krisch,
Tilo Baumbach,
S. Stankov
Publication year - 2016
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.116.185501
Subject(s) - condensed matter physics , phonon , curie temperature , inelastic scattering , physics , inelastic neutron scattering , scattering , coupling (piping) , ferromagnetism , spin wave , materials science , quantum mechanics , metallurgy
Comprehensive studies of lattice dynamics in the ferromagnetic semiconductor EuO have been performed by a combination of inelastic x-ray scattering, nuclear inelastic scattering, and ab initio calculations. A remarkably large broadening of the transverse acoustic phonons was discovered at temperatures above and below the Curie temperature T_{C}=69 K. This result indicates a surprisingly strong momentum-dependent spin-phonon coupling induced by the spin dynamics in EuO