48 citations · 88 across the 11 of their papers we have counts for
6 papers · 1 filter
Critical and non critical non-Hermitian topological phase transitions in one dimensional chains
Rui Aquino, Nei Lopes, Daniel G. Barci
In this work we investigate non-Hermitian topological phase transitions using real-space edge states as a paradigmatic tool. We focus on the simplest non-Hermitian variant of the S…
Incommensurate charge density wave on multiband intermetallic systems exhibiting competing orders
Nei Lopes, Daniel Reyes, Natanael C. Costa +2
The appearance of an incommensurate charge density wave vector on multiband intermetallic systems presenting commensurate charge density wave (CDW) and sup…
Excitonic insulators and Gross-Neveu models
Nei Lopes, Mucio A. Continentino, Daniel G. Barci
We introduce a generalized Gross-Neveu (GN) model to describe the excitonic instabilities in two different systems: a small overlap semi-metal (SM) and a small gap semi-conductor (…
Interplay between charge density wave and superconductivity in multi-band systems with inter-band Coulomb interaction
Nei Lopes, Daniel Reyes, Mucio A. Continentino +1
In this work we study the competition or coexistence between charge density wave (CDW) and superconductivity (SC) in a two-band model system in a square lattice. One of the bands h…
Finite temperature effects in quantum systems with competing scalar orders
Nei Lopes, Daniel G. Barci, Mucio A. Continentino
The study of the competition or coexistence of different ground states in many-body systems is an exciting and actual topic of research, both experimentally and theoretically. Quan…
One-loop effective potential for two-dimensional competing scalar order parameters
Nei Lopes, Mucio A. Continentino, Daniel G. Barci
Using the method of the effective potential of quantum field theory, we compute the quantum corrections to the phase diagram of systems with competing order parameters. This is spe…