Metallization of vanadium dioxide driven by large phonon entropy

John D. Budai (), Jiawang Hong, Michael E. Manley, Eliot D. Specht, Chen W. Li, Jonathan Z. Tischler, Douglas L. Abernathy, Ayman H. Said, Bogdan M. Leu, Lynn A. Boatner, Robert J. McQueeney and Olivier Delaire ()
Additional contact information
John D. Budai: Oak Ridge National Laboratory
Jiawang Hong: Oak Ridge National Laboratory
Michael E. Manley: Oak Ridge National Laboratory
Eliot D. Specht: Oak Ridge National Laboratory
Chen W. Li: Oak Ridge National Laboratory
Jonathan Z. Tischler: Advanced Photon Source, Argonne National Laboratory
Douglas L. Abernathy: Oak Ridge National Laboratory
Ayman H. Said: Advanced Photon Source, Argonne National Laboratory
Bogdan M. Leu: Advanced Photon Source, Argonne National Laboratory
Lynn A. Boatner: Oak Ridge National Laboratory
Robert J. McQueeney: Neutron Sciences Directorate, Oak Ridge National Laboratory
Olivier Delaire: Oak Ridge National Laboratory

Nature, 2014, vol. 515, issue 7528, 535-539

Abstract: X-ray and neutron scattering measurements and ab initio molecular dynamics calculations show that the transition from an insulating phase to a metallic phase in vanadium dioxide is driven primarily by the entropic effects of soft anharmonic lattice vibrations, or phonons, which stabilize the metallic phase.

Date: 2014
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DOI: 10.1038/nature13865

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