Titlebook: Elementary Excitations in Solids, Molecules, and Atoms; Part A Jozef T. Devreese (Professor of Theoretical Physic Book 1974 Springer Scienc

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Overlay and Transition in Libya, the alkali-halide crystals was lacking. The only generally accepted results for these materials was the identification of the shoulder in the optical absorption of these substances on the high energy side of the exciton absorption as being due to a band to band transition at r, the center of the Br

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Libya and Its North African Policy,th in a bandstructure calculation. We call it quasi-particle to remember that the excitation is something more general and complicated than just an electron moving in some periodic potential. To bring out the essential points in the simplest way, let us discuss the electron gas. The Hamiltonian in s

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https://doi.org/10.1007/978-3-8349-4069-8xcitations are the long-wave-length plasma oscillations in charged plasmas and the phonons in all states of aggregation of matter. The collective oscillations of a system of interacting neutral dipoles has not received the same attention.

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