Buscar
Mostrando ítems 1-10 de 26
Pseudogap in cuprates driven by d-wave flux-phase order proximity effects: A theoretical analysis from Raman and ARPES experiments
(IOP Publishing, 2014-10)
One of the puzzling characteristics of the pseudogap phase of high-Tc cuprates is the nodal-antinodal dichotomy. While the nodal quasiparticles have a Fermi liquid behaviour, the antinodal ones show non-Fermi liquid features ...
Pseudogap e energia cinética de supercondutores não convencionais descritos por um modelo de Hubbard em duas dimensões
(Universidade Federal de Santa MariaBrasilFísicaUFSMPrograma de Pós-Graduação em FísicaCentro de Ciências Naturais e Exatas, 2020-03-30)
In conventional superconductors described by the Bardeen-Cooper-Schrieffer (BCS) Theory,
the transition from the normal to the superconducting state is accompanied by a reduction
in the potential energy and an increase ...
Self-energy effects in cuprates and the dome-shaped behavior of the superconducting critical temperature
(American Physical Society, 2014-01)
Hole-doped cuprates show a superconducting critical temperature Tc which follows a universal dome-shaped behavior as a function of doping. It is believed that the origin of superconductivity in cuprates is entangled with ...
Unconventional superconductivity in the strong-coupling limit for the heavy fermion system CeCoIn5
(Elsevier Science, 2018-05)
We present scanning tunneling spectroscopy measurements of the local quasiparticles' excitation spectra of the heavy fermion CeCoIn5 between 440 mK and 3 K in samples with a bulk Tc=2.25K. The spectral shape of our ...
Efeitos da hibridização no pseudogap em um modelo de Hubbard d-p
(Universidade Federal de Santa MariaBrasilFísicaUFSMPrograma de Pós-Graduação em FísicaCentro de Ciências Naturais e Exatas, 2019-08-30)
In this paper, we investigate the effects of hybridization with different symmetries on
the normal and superconducting properties of a Hubbard d-p model. The Hubbard d-p model
is a variation of the model proposed by ...
Strong particle-hole asymmetry of charge instabilities in doped Mott insulators
(IOP Publishing, 2014-12)
We study possible charge instabilities in doped Mott insulators by employing the two-dimensional t-J model with a positive value of the next nearest-neighbour hopping integral t on a square lattice, which is applicable to ...
Quantum phase transition triggering magnetic bound states in the continuum in graphene
(2015-12-07)
Graphene hosting a pair of collinear adatoms in the phantom atom configuration has density of states vanishing in the vicinity of the Dirac point which can be described in terms of the pseudogap scaling as cube of the ...
Isotope effect on the superconducting critical temperature of cuprates in the presence of charge order
(Iop Publishing, 2015-11)
Using the large-N limit of the t–J model and also allowing for phonons and the electron–phonon interaction, we study the isotope effect α for coupling constants appropriate for YB2C3O y . We find that α has a minimum at ...
Spin-orbit coupling in the superconducting phase and DDW states of high-T-c cuprates
(Springer, 2010-07-01)
The effects of the spin-orbit coupling are considered for the high T (c) cuprates with asymmetric superconducting gap (SC) and the d-density wave (DDW) phase due to its vital role in the experimental determination of the ...