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Evolução da superfície de Fermi do La2-xSrxCuO4: estados locais de Wannier/Hartree-Fock
(Universidade Federal de PernambucoUFPEBrasilPrograma de Pos Graduacao em Fisica, 2017)
Electric field effects in a two-dimensional Disordered Hubbard-Mott model
(Brasil, 2002)
We have studied the effects of disorder, correlation, external electric field, impurity concentration, and impurity location near and at the Si−SiO2 interface of a metal-oxide-semiconductor field-effect transistor, in the ...
Critical concentration for the doping-induced metal–nonmetal transition in cubic and hexagonal GaN
(2002-09-01)
The critical concentration for the metal–nonmetal transition has been calculated for n-type and p-type GaN. Both cubic and hexagonal structures of GaN have been considered. Three different computational methods have been ...
Broken discrete and continuous symmetries in two dimensional spiral antiferromagnets
(IOP Publishing, 2013-09)
We study the occurrence of symmetry breakings, at zero and finite temperatures, in the J1-J3 antiferromagnetic Heisenberg model on the square lattice using Schwinger boson mean field theory. For spin 1/2 the ground state ...
Diagrama de fases de átomos bosónicos sujetos a confinamiento no diagonal
(2014)
Los sistemas de muchas partículas conformados por bosones, se han estudiado de forma extensa gracias a los aportes significativos que se han hecho a la física de bajas temperaturas; el condensado de Bose-Einstein y la ...
Transição de fase Superfluido-Isolante de Mott em redes ópticas via modelo de Jaynes-Cummings-Hubbard
(Universidade Federal de SergipePós-Graduação em FísicaBRUFS, 2017)
Mott insulator and superfluid phases in bosonic superlattices
(2016-02-12)
We study the ground-state phase diagram of boson chains on a 2-period superlattice
using the density matrix renormalization group method. New insulators for commensurate
densities were found, diferentiated by the arrangement ...
Anyon-Hubbard model in optical lattices
(2017-07)
Abstract. Anyons can be considered to be a third class of particles with nontrivial exchange statistics that interpolate between fermions and bosons (they do not obey Bose-Einstein or Fermi-Dirac statistics). For two ...
Bose glass and Mott glass of quasiparticles in a doped quantum magnet
(NATURE PUBLISHING GROUPLONDON, 2012)
The low-temperature states of bosonic fluids exhibit fundamental quantum effects at the macroscopic scale: the best-known examples are Bose-Einstein condensation and superfluidity, which have been tested experimentally in ...