Zobrazeno 1 - 10
of 254
pro vyhledávání: '"Barisic S"'
Autor:
Barišić, O. S., Barišić, S.
A theory of the underlying metallic state of large-U$_d$ high-Tc cuprates is presented starting from the covalent Cu-2O 3-band model associated with a sufficiently small copper occupancy. U$_d=\infty$ is dealt by the slave fermion approach. Diagramma
Externí odkaz:
http://arxiv.org/abs/1312.6622
Publikováno v:
Journal of Superconductivity and Novel Magnetism 27, 969-975 (2014)
We report on the interplay of localized and extended degrees of freedom in the metallic state of high-temperature superconductors in a multiband setting. Various ways in which the bare magnetic response may become incommensurate are measured against
Externí odkaz:
http://arxiv.org/abs/1310.6737
Publikováno v:
J. Phys.: Condens. Matter 25 (2013) 145602
A systematic method of calculating the dynamical conductivity tensor in a general multiband electronic model with strong boson-mediated electron-electron interactions is described. The theory is based on the exact semiclassical expression for the cou
Externí odkaz:
http://arxiv.org/abs/1302.6062
Publikováno v:
Journal of Superconductivity and Novel Magnetism 26, 2669-2673 (2013)
The role of the oxygen degree of freedom in the cuprates' superconducting planes is analyzed in detail. Structural and photoemission results are reviewed to show that the most sparse description of the in-plane electronic states requires explicit con
Externí odkaz:
http://arxiv.org/abs/1210.0383
Autor:
Barišić, S., Barišić, O. S.
A large-Ud theory is constructed for the metallic state of high-Tc cuprates. The Emery three-band model, extended with Ox-Oy hopping tpp, and with Ud tending to infinity, is mapped on slave fermions. The Dyson time-dependent diagrammatic theory in te
Externí odkaz:
http://arxiv.org/abs/1110.1947
Autor:
Barišić, O. S., Barišić, S.
Publikováno v:
Eur. Phys. J. B. 85, 111 (2012)
The single bipolaron problem is examined in the context of the 1D Holstein-Hubbard model, emphasizing analogies and differences with respect to the complementary single polaron physics. The bipolaron band structure below the phonon threshold is revea
Externí odkaz:
http://arxiv.org/abs/1006.3160
Autor:
Barišić, S., Barišić, O. S.
The large U_d theory, based on the Emery three band model extended with the Ox-Oy hopping t_pp, is constructed for the metallic state of high-Tc cuprates, using the mapping on the slave fermion theory. The time-dependent diagrammatic theory in terms
Externí odkaz:
http://arxiv.org/abs/1004.5082
Autor:
Barisic, S., Barisic, O. S.
Atomic repulsion $U_d$ on the Cu site in high T$_c$ cuprates is large but, surprisingly, some important properties are consistent with moderate couplings. The time dependent perturbation theory with slave particles is therefore formulated in the $U_d
Externí odkaz:
http://arxiv.org/abs/0812.1136
Autor:
Barisic, O. S., Barisic, S.
Publikováno v:
Colloquia paper, Eur. Phys. J. B 64, 1-18 (2008)
The behavior of the 1D Holstein polaron is described, with emphasis on lattice coarsening effects, by distinguishing between adiabatic and nonadiabatic contributions to the local correlations and dispersion properties. The original and unifying syste
Externí odkaz:
http://arxiv.org/abs/0802.1154
Autor:
Barisic, O. S., Barisic, S.
Publikováno v:
Eur. Phys. J. B 54, 1 (2006).
The translationally invariant diagrammatic quantum perturbation theory (TPT) is applied to the polaron problem on the 1D lattice, modeled through the Holstein Hamiltonian with the phonon frequency omega0, the electron hopping t and the electron-phono
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607731