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...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.展开更多
The concept of bound states for superstrings is analyzed, and using Schwinger’s func-tional method, the equation of the 4-string Green functionals for superstring fields, theequation of corresponding wave functionals...The concept of bound states for superstrings is analyzed, and using Schwinger’s func-tional method, the equation of the 4-string Green functionals for superstring fields, theequation of corresponding wave functionals and the orthonormality relation of the bound-state wave functionals have been derived.展开更多
文摘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.
文摘The concept of bound states for superstrings is analyzed, and using Schwinger’s func-tional method, the equation of the 4-string Green functionals for superstring fields, theequation of corresponding wave functionals and the orthonormality relation of the bound-state wave functionals have been derived.
