The Modern Theory of Solids

absolute zero alkali metals alloys approximation assume atoms band cesium chloride Chap charge distribution classical coefficient cohesive energy components computed constant coordinates correlation corresponding cubic curve d band D. R. Hartree Debye Debye's density derived determined discuss distance eigenfunctions equal excited expression ferromagnetic field Fock's equations free electrons frequency Hamiltonian Hartree Heitler-London Hence integral interaction interatomic ionic crystals ions kg cal/mol lattice levels lowest magnetic mean value method modes molecules monatomic normal number of electrons observed obtained one-electron functions oxide particles Pauli principle phase Phys Physik potential Proc quantity quantum mechanics r₁ satisfy Schrödinger equation semi-conductors shown in Fig sodium chloride solid solutions specific heat spin surface symmetrical Table temperature theoretical theory tion total number transition unit cell valence electrons variables vector velocity vibration wave functions wave number Zincblende zone