Thermally populated intrinsic localized modes in pure alkali halide crystals

A. J. Sievers, M. Sato, J. B. Page, and T. Rössler
Phys. Rev. B 88, 104305 – Published 19 September 2013

Abstract

The possibility of thermal excitation of intrinsic localized modes (ILMs) arising from anharmonicity in ionic perfect crystals is studied numerically for realistic model systems in one and three dimensions. Implications are discussed for an interesting high-temperature feature seen in earlier inelastic neutron scattering experiments on single crystal NaI. The general conclusion is that ILM formation energies are far too large for thermal excitation of ILMs to account for the observed feature in a pure crystal.

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  • Received 17 July 2013

DOI:https://doi.org/10.1103/PhysRevB.88.104305

©2013 American Physical Society

Authors & Affiliations

A. J. Sievers1, M. Sato2, J. B. Page3, and T. Rössler4

  • 1Laboratory of Atomic and Solid State Physics, Cornell University Ithaca, New York 14853-2501, USA
  • 2Graduate School of Natural Science and Technology, Kanasawa University, Kanasawa, Ishikawa 920-1192, Japan
  • 3Department of Physics, Arizona State University Tempe, Arizona 85287-1504, USA
  • 4Yingli Green Energy Europe GMBH, Heimeranstr. 37, D 80339 Munich, Germany

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Issue

Vol. 88, Iss. 10 — 1 September 2013

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