BaCuS₂: A Superconductor with Moderate Electron-Electron Correlation*

Short-range exchange-correlation energy of a uniform electron gas with modified electron-electron interaction

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Investigation of electron correlation effects in armchair silicene nanoribbons

In this study, the electronic structure of armchair silicene nanoribbons (ASiNRs) is investigated for various widths using first-principle calculations and the framework of the density functional theory. Electronic structure of ASiNRs shows a direct band gap which is decreased  with increasing the nanoribbon's width, showing an oscillatory behavior. The effective Coulomb interaction between loca...

Local Electron Correlation

Traditional configuration-based theories of dynamic electron correlation, such as variational configuration interaction(CI), Møller-Plesset perturbation theory(MPn), and coupled-cluster (CC) theory, exhibit steep scaling with both the number of basis functions and the number of electrons. Their overall formal scaling at constant basis set quality varies between O(N 5) and O(N 7) or higher, wher...

Tuning Correlation Effects with Electron–Phonon Interactions

Electron-fluctuation interaction in a non-Fermi superconductor

We studied the influence of the amplitude fluctuations of a non-Fermi superconductor on the energy spectrum of the 2D Anderson non-Fermi system. The classical fluctuations give a temperature dependence in the pseudogap induced in the fermionic excitations.