Supplemental Material for “Thermally-driven electronic topological transition in FeTi”
نویسندگان
چکیده
F. C. Yang, J. A. Muñoz, 2 O. Hellman, L. Mauger, M. S. Lucas, 3 S. J. Tracy, M. B. Stone, D. L. Abernathy, Yuming Xiao, and B. Fultz Applied Physics and Materials Science, California Institute of Technology, Pasadena, CA 91125 The Datum Institute, Beaverton, OR 97005 Air Force Research Laboratory, Wright-Patterson AFB, OH 45433 Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL, 60439 (Dated: July 15, 2016)
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Thermally Driven Electronic Topological Transition in FeTi.
Ab initio molecular dynamics, supported by inelastic neutron scattering and nuclear resonant inelastic x-ray scattering, showed an anomalous thermal softening of the M_{5}^{-} phonon mode in B2-ordered FeTi that could not be explained by phonon-phonon interactions or electron-phonon interactions calculated at low temperatures. A computational investigation showed that the Fermi surface undergoe...
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