Giant electrothermal conductivity and spin-phonon coupling in an antiferromagnetic oxide

C. Chiorescu, J. J. Neumeier, Joshua Cohn

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The application of weak electric fields (100V/cm) is found to dramatically enhance the lattice thermal conductivity of the antiferromagnetic insulator CaMnO3 over a broad range of temperature about the Néel ordering point (125 K). The effect is coincident with field-induced detrapping of bound electrons, suggesting that phonon scattering associated with short- and long-ranged antiferromagnetic order is suppressed in the presence of the mobilized charge. This interplay between bound charge and spin-phonon coupling might allow for the reversible control of spin fluctuations using weak external fields.

Original languageEnglish (US)
Article number257202
JournalPhysical Review Letters
Volume101
Issue number25
DOIs
StatePublished - Dec 15 2008

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conductivity
oxides
thermal conductivity
insulators
electric fields
scattering
electrons
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Giant electrothermal conductivity and spin-phonon coupling in an antiferromagnetic oxide. / Chiorescu, C.; Neumeier, J. J.; Cohn, Joshua.

In: Physical Review Letters, Vol. 101, No. 25, 257202, 15.12.2008.

Research output: Contribution to journalArticle

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