Theory of Electron Density of States of High Temperature Impurity Induced Anharmonic Superconductors ()
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.
Share and Cite:
H. Singh, A. Singh, V. Ashokan and B. Indu, "Theory of Electron Density of States of High Temperature Impurity Induced Anharmonic Superconductors,"
Advances in Materials Physics and Chemistry, Vol. 2 No. 4, 2012, pp. 249-254. doi:
10.4236/ampc.2012.24037.
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