Lattice Dynamics of Alkali Metals in a Three-Body Interaction |
| A.A. Coelho Instituto de Fisica, UNICAMP, C.P. 6165, 13081 Campinas, SP, Brasil and M.M. Shukla Departamento de Fisica, UNESP, C.P. 473, 17033 Bauru, SP, Brasil |
| Received: March 23, 1994 |
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| The original model of Das et al. is modified in extending the electron-ion interaction on a three-body forces and including the crystal equilibrium condition to reduce one independent parameter. We studied the phonon dispersion relations along the three principal symmetry directions i.e. [ξ,0,0], [ξ,ξ,0] and [ξ,ξ,ξ] and θ-T curves of alkali metals, Na, K, Rb, Cs and Li. There is close agreement between the computed results and the experimental observations. |
| DOI: 10.12693/APhysPolA.87.599 PACS numbers: 63.20.-e, 65.40.-f |