Abstract
AbstractThe Green's function technique is applied to study theoretically the changes in phonon specific heat and transition temperature of V due to introduction of heavy (U) and light (Be) impurities. Changes in force constants (radial and angular), in mass and in volume are taken into account. The anharmonic effects due to large impurity motions are accounted for within the quasiharmonic approximation and the relaxations of the V neighbours of an impurity are also included. The electron–phonon and electron–impurity interactions are discussed. The calculated results are in good agreement with the experimental results for both the properties.
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