Phonon dynamics of plutonium chalcogenides and pnictides |
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Authors: | Balwant S. Arya Mahendra Aynyas |
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Affiliation: | a Department of Physics, Govt. Narmada College, Hoshangabad 461001, India b Department of Physics, S.V. College, Bhopal 462030, India c Department of Physics, University of Bhopal, Bhopal 462026, India |
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Abstract: | We have investigated the phonon dynamics of the plutonium compounds (PuX; X = S, Se, Te, As, and Sb) by using rigid ion (RIM) and breathing shell models (BSM), later includes breathing motion of the electrons of the Pu-atoms due to f-d hybridization. We discuss the significance of these two approaches in predicting the phonon dispersion curves of PuX compounds and examine the role of electron-phonon interactions. Dominant ionic nature of bonding has been predicted for PuX compounds from the large LO-TO phonon splitting at zone center. We also report the one phonon density of states and first time calculated the lattice specific heat for these compounds. |
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