69 citations · 354 across the 25 of their papers we have counts for
24 papers
Transport of Dirac magnons driven by gauge fields
Luis Fernández, Ka Shen, Leandro O. Nascimento +3
We present a unified quantum field theory for Dirac magnons coupled to emergent gauge fields. At zero temperature, any space- and time-dependent gauge perturbation drives magnons o…
Podolsky quantum electrodynamics for strongly coupled Dirac fermions in (2+1)D
Carlos A. P. C. Junior, Leandro O. Nascimento, Van Sérgio Alves
We investigate generalized quantum electrodynamics (GQED), a higher-derivative extension of quantum electrodynamics in (3+1) dimensions. We perform a dimensional reduction of this…
Dynamical mass generation and critical behavior in pseudo-Proca quantum electrodynamics
Helio G. Barroso, Van Sérgio Alves, Leandro O. Nascimento
We investigate dynamical mass generation in pseudo-Proca quantum electrodynamics (PPQED) by means of Schwinger--Dyson equations in rainbow-quenched and unquenched truncations. The…
Renormalization of the optical band gap through an effective Thirring interaction for massive Dirac-like electrons
Nilberto Bezerra, Van Sérgio Alves, Leandro O. Nascimento +1
We analyze mass renormalization in massive Dirac-like systems in (2+1) dimensions arising from electron-phonon interactions at finite temperatures, employing the large- expansio…
Effects of the two-dimensional Coulomb interaction in both Fermi velocity and energy gap for Dirac-like electrons at finite temperature
Nilberto Bezerra, Van Sérgio Alves, Leandro O. Nascimento +1
We describe both the Fermi velocity and the mass renormalization due to the two-dimensional Coulomb interaction in the presence of a thermal bath. To achieve this, we consider an a…
Effects of the Pseudo-Chern-Simons action for strongly correlated electrons in the plane
Rodrigo F. Ozela, Van Sérgio Alves, Gabriel C. Magalhães +1
Chiral symmetry breaking comes from the mass dynamically generated through interaction of Dirac fermions for both quantum electrodynamics in (2+1)D (QED3) and (3+1)D (QED4). In QED…
Bosonization, mass generation, and the pseudo Chern-Simons action
Gabriel C. Magalhães, Van S. Alves, Leandro O. Nascimento +1
We discuss several aspects of a generalization of the Chern-Simons action containing the pseudo-differential operator, which we shall call pseudo Chern-Simons (PCS).…
The two-gap BCS model in the large- approximation within a field-theory approach
Leandro O. Nascimento
We study the continuum version of the two-gap BCS model in (3+1)D within the large-N approximation. We calculate the effective potential of the model which depends on two independe…
Influence of the four-fermion interactions in (2+1)D massive electrons system
Luis Fernández, Van Sérgio Alves, M. Gomes +2
The description of the electromagnetic interaction in two-dimensional Dirac materials, such as graphene and transition-metal dichalcogenides, in which electrons move in the plane a…
Dynamical Mass Generation in Pseudo Quantum Electrodynamics with Gross-Neveu Interaction at finite temperature
Luis Fernández, Reginaldo O. Corrêa, Van Sérgio Alves +2
We study the dynamical mass generation in Pseudo Quantum Electrodynamics (PQED) coupled to the Gross-Neveu (GN) interaction, in (2+1) dimensions, at both zero and finite temperatur…
Renormalization of the band gap in 2D materials through the competition between electromagnetic and four-fermion interactions
Luis Fernández, Van Sérgio Alves, Leandro O. Nascimento +3
Recently the renormalization of the band gap , in both WSe and MoS, has been experimentally measured as a function of the carrier concentration . The main result esta…
Pseudo Quantum Electrodynamics and Chern-Simons theory Coupled to Two-dimensional Electrons
Gabriel C. Magalhães, Van S. Alves, Eduardo C. Marino +1
We study a nonlocal theory that combines both the Pseudo quantum electrodynamics (PQED) and Chern-Simons actions among two-dimensional electrons. In the static limit, we conclude t…
Projected Proca Field Theory: a One-Loop Study
R. F. Ozela, Van Sérgio Alves, E. C. Marino +4
The recent discovery of two-dimensional Dirac materials, such as graphene and transition-metaldichalcogenides, has raised questions about the treatment of hybrid systems, in which…
Bosonic interactions in a nonlocal theory in (2+1) dimensions
Ygor Pará, Van Sérgio Alves, Tommaso Macrì +2
Pseudo-Quantum Electrodynamics (PQED) provides an excellent description of the interaction between charged particles confined to a plane. When we couple pseudo-gauge field with a b…
Bounded particle interactions driven by a nonlocal dual Chern-Simons model
Van Sérgio Alves, E. C. Marino, Leandro O. Nascimento +3
Quantum electrodynamics (QED) of electrons confined in a plane and that yet can undergo interactions mediated by an unconstrained photon has been described by the so-called {\it ps…
Two-dimensional Yukawa interaction driven by a nonlocal-Proca quantum electrodynamics
Van Sérgio Alves, Tommaso Macrì, Gabriel C. Magalhães +2
We derive two versions of an effective model to describe dynamical effects of the Yukawa interaction among Dirac electrons in the plane. Such short-range interaction is obtained by…
Quantum-electrodynamical approach to the exciton spectrum in Transition-Metal Dichalcogenides
E. C. Marino, Leandro O. Nascimento, Van Sérgio Alves +2
Manipulation of intrinsic electron degrees of freedom, such as charge and spin, gives rise to electronics and spintronics, respectively. Electrons in monolayer materials with a hon…
Dynamical Mass Generation in Pseudo Quantum Electrodynamics with Four-Fermion Interactions
Van Sérgio Alves, Reginaldo O. C. Junior, E. C. Marino +1
We describe dynamical symmetry breaking in a system of massless Dirac fermions with both electromagnetic and four-fermion interactions in (2+1) dimensions. The former is described…
Emerging Quantum Hall Effect in Massive Dirac Systems
Leandro O. Nascimento, E. C. Marino, Van Sérgio Alves +1
An interaction-driven nonzero quantum Hall conductivity is shown to occur in time-reversal symmetric massive Dirac materials, in the absence of any external agent. The effect is pr…
Introduction to Topological Phases and Electronic Interactions in (2+1) Dimensions
Leandro O. Nascimento
A brief introduction to topological phases is provided, considering several two-band Hamiltonians in one- and two-dimensions. Relevant concepts of the topological insulator theory,…
Spin g-factor due to electronic interactions in graphene
N. Menezes, Van Sergio Alves, E. C. Marino +3
The gyromagnetic factor is an important physical quantity relating the magnetic-dipole moment of a particle to its spin. The electron spin g-factor in vacuo is one of the best mode…
Chiral-Symmetry Breaking in Pseudo Quantum Electrodynamics at Finite Temperature
Leandro O. Nascimento, Van Sérgio Alves, Francisco Peña +2
We use the Schwinger-Dyson equations in the presence of a thermal bath, in order to study chiral symmetry breaking in a system of massless Dirac fermions interacting through pseudo…
Unitarity of theories containing fractional powers of the d'Alembertian operator
E. C. Marino, Leandro O. Nascimento, Van Sérgio Alves +1
We examine the unitarity of a class of generalized Maxwell U(1) gauge theories in (2+1) D containing the pseudodifferential operator , for . We show that on…
Interaction Induced Quantum Valley Hall Effect in Graphene
E. C. Marino, Leandro O. Nascimento, Van Sergio Alves +1
We use Pseudo Quantum Electrodynamics (PQED) in order to describe the full electromagnetic interaction of the p-electrons of graphene in a consistent 2D formulation. We first consi…