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has been cited by the following article:

• TITLE: Theory of Electron Density of States of High Temperature Impurity Induced Anharmonic Superconductors

  AUTHORS: Hempal Singh, Anu Singh, Vinod Ashokan, B. D. Indu

  KEYWORDS: Dyson’s Equation; Lehman Representation; Anharmonicity

  JOURNAL NAME: Advances in Materials Physics and Chemistry, Vol.2 No.4, December 31, 2012

  ABSTRACT: The expression for the electron density of states (EDOS) of high temperature superconductors (HTS) has been derived taking the disorder and anharmonicity effects as a central problem. This has been dealt with the help of double time thermodynamic Green’s function theory for electrons via a generalized Hamiltonian which consists of the contribution due to 1) unperturbed electrons; 2) unperturbed phonons; 3) isotopic impurities; 4) anharmonicities (no BCS type Hamiltonian has been taken up in the formulation); and 5) electron-phonon interactions. The renormalization effects and emergence of pairons appears as a unique feature of the theory and dependence of EDOS on impurity concentration and temperature has been discussed in details with special reference to the HTS.