2 papers
cond-mat.str-el2026
Ghost-RISB for Correlated Electron-Phonon Systems: Application to the Hubbard-Holstein Model
Samuele Giuli, Ricardo J. Campos-Lopes, Emin Moghadas +1
We develop a generalization of the ghost-rotationally-invariant slave-boson (ghost-RISB) method that incorporates local phonon modes coupled to arbitrary on-site electronic degrees…
cond-mat.stat-mech2024
First-order and Berezinskii-Kosterlitz-Thouless phase transitions in two-dimensional generalized XY models
P. A. da Silva, R. J. Campos-Lopes, A. R. Pereira
The aim of this paper is to illustrate that generalized two-dimensional XY models (proposed by Romano and Zagrebnov) may also support a first-order phase transition. Two approaches…