Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Nascimento, Leandro O."'
Publikováno v:
Physical Review D-2023
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 anisotropic version of pseudo quantum electrodynamics (PQED), within a
Externí odkaz:
http://arxiv.org/abs/2305.09604
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 QED3, the presence of a Chern-Simons (CS) parameter affects the critical
Externí odkaz:
http://arxiv.org/abs/2110.01085
Autor:
Nascimento, Leandro O.
Publikováno v:
Europhysics Letters 2023
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 independent energy gaps $\sigma$ and $\Delta$, where $\sigma$ describes the Coo
Externí odkaz:
http://arxiv.org/abs/2105.01014
Publikováno v:
Phys. Rev. D 103, 116022 (2021)
We discuss several aspects of a generalization of the Chern-Simons action containing the pseudo-differential operator$\sqrt{-\Box}$, which we shall call pseudo Chern-Simons (PCS). Firstly, we derive the PCS from the bosonization of free massive Dirac
Externí odkaz:
http://arxiv.org/abs/2104.01416
Publikováno v:
Phys. Rev. D 103, 105016 (2021)
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 and interact via virtual photons in 3d, leads naturally to the emergenc
Externí odkaz:
http://arxiv.org/abs/2103.07979
Autor:
Fernández, Luis, Corrêa Jr., Reginaldo O., Alves, Van Sérgio, Nascimento, Leandro O., Peña, Francisco
Publikováno v:
Phys. Rev. D 103, 025018 (2021)
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 temperatures. We start with a gapless model and show that, under particular cond
Externí odkaz:
http://arxiv.org/abs/2009.09017
Autor:
Fernández, Luis, Alves, Van Sérgio, Nascimento, Leandro O., Peña, Francisco, Gomes, M., Marino, E. C.
Publikováno v:
Phys. Rev. D 102, 016020 (2020)
Recently the renormalization of the band gap $m$, in both WSe$_2$ and MoS$_2$, has been experimentally measured as a function of the carrier concentration $n$. The main result establishes a decreasing of hundreds of meV, in comparison with the bare b
Externí odkaz:
http://arxiv.org/abs/2002.10027
Publikováno v:
Phys. Rev. D 101, 116005 (2020)
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 that the competition of these two interactions yields a Coulomb potenti
Externí odkaz:
http://arxiv.org/abs/2001.05378
Autor:
Ozela, R. F., Alves, Van Sérgio, Marino, E. C., Nascimento, Leandro O., Neto, J. F. Medeiros, Ramos, Rudnei O., Smith, C. Morais
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 electrons moving in a two-dimensional plane interact via virtual photo
Externí odkaz:
http://arxiv.org/abs/1907.11339
Publikováno v:
Phys. Rev. D 100, 085010 (2019)
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 bosonic matter field, we obtain the so-called Scalar Pseudo-Quantum Ele
Externí odkaz:
http://arxiv.org/abs/1906.08334