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Localized vibrations at vacant sites in cubic crystals ∗ ∗ Based in part on a dissertation submitted by P.L. Land to the University of Missouri in partial fulfillment of the requirements for the degree of Doctor of Philosophy. The first part of this work was done at the Institute for Theoretical Physics in Uppsala where the authors were visitor and Guest Professor of Nordita, respectively, during the 1962–1963 academic year. A preliminary report was given at the Conference on Lattice Dynamics in Copenhagen in August 1963.(1) |
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