• Electron-electron interaction : This is again a Coulombic interaction involving pairs of electrons. This part of the Hamiltonian is what makes the many-body problem so hard, in most cases impossible, to tackle. Almost all electronic structure calculation methods resort to approximations which simplify the electron-electron interaction. The quality of the particular calculation used for a syst...

In two-dimensional (2D) disordered superconductors prior to superconducting (SC) transition, the appearance of a resistance peak in temperature dependent $R(T)$ measurements indicates presence weak localization (WL) and electron-electron interaction (EEI) diffusion channel SC fluctuations Cooper channel. Here, we demonstrate an interplay between EEI by low-temperature magnetotransport for set 2...

In disordered transition-metal dichalcogenide (TMD) superconductor, both the strong spin-orbit coupling (SOC) and disorder show remarkable effects on superconductivity. However, features of SOC are rarely detected directly. Herein, quantum transport behaviors arising from interplay in TMD superconductor 1T-NbSeTe reported. Before entering superconducting state, single crystal at low temperature...

We expand the theory of the inverse free electron laser (IFEL) interaction to include the possibility of energy exchange that takes place when relativistic particles traversing an undulator interact with an electromagnetic wave of a frequency that is a harmonic of the fundamental wiggler resonant frequency. We derive the coupling coefficients as a function of the IFEL parameters for all harmoni...

The matrix elements of the deformation potential of C 70 are calculated by means of a simple, yet accurate solution of the electron-phonon coupling problem in fullerenes, based on a parametrization of the ground state electronic density of the system in terms of sp 2+x hybridized orbitals. The value of the calculated dimensionless total electron-phonon coupling constant is λ ≈ 0.1, an order of ...