Magnetic moments induce strong phonon renormalization in FeSi

S. Krannich, Y. Sidis, D. Lamago, R. Heid, J.-M. Mignot, H. v. Löhneysen, A. Ivanov, P. Steffens, T. Keller, L. Wang, E. Goering and F. Weber ()
Additional contact information
S. Krannich: Institute for Solid State Physics, Karlsruhe Institute of Technology
Y. Sidis: Laboratoire Léon Brillouin (CEA-CNRS), CEA Saclay
D. Lamago: Institute for Solid State Physics, Karlsruhe Institute of Technology
R. Heid: Institute for Solid State Physics, Karlsruhe Institute of Technology
J.-M. Mignot: Laboratoire Léon Brillouin (CEA-CNRS), CEA Saclay
H. v. Löhneysen: Institute for Solid State Physics, Karlsruhe Institute of Technology
A. Ivanov: Institute Laue-Langevin
P. Steffens: Institute Laue-Langevin
T. Keller: Max Planck Institute for Solid State Research
L. Wang: Institute for Solid State Physics, Karlsruhe Institute of Technology
E. Goering: Max Planck Institute for Intelligent Systems
F. Weber: Institute for Solid State Physics, Karlsruhe Institute of Technology

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract The interactions of electronic, spin and lattice degrees of freedom in solids result in complex phase diagrams, new emergent phenomena and technical applications. While electron–phonon coupling is well understood, and interactions between spin and electronic excitations are intensely investigated, only little is known about the dynamic interactions between spin and lattice excitations. Noncentrosymmetric FeSi is known to undergo with increasing temperature a crossover from insulating to metallic behaviour with concomitant magnetic fluctuations, and exhibits strongly temperature-dependent phonon energies. Here we show by detailed inelastic neutron-scattering measurements and ab initio calculations that the phonon renormalization in FeSi is linked to its unconventional magnetic properties. Electronic states mediating conventional electron–phonon coupling are only activated in the presence of strong magnetic fluctuations. Furthermore, phonons entailing strongly varying Fe–Fe distances are damped via dynamic coupling to the temperature-induced magnetic moments, highlighting FeSi as a material with direct spin–phonon coupling and multiple interaction paths.

Date: 2015
References: Add references at CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.nature.com/articles/ncomms9961 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9961

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms9961

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().