313 citations · 1k across the 33 of their papers we have counts for
21 papers · 1 filter
Anomalous temperature dependence of polaron mobility in a nonlinear double-well potential: unbiased X-propagator approach
Stefano Ragni, Osor S. Barišić, Naoto Nagaosa +1
We develop an unbiased X-propagator method for calculating finite-temperature optical conductivity and dc mobility for arbitrary nonlinear electron-phonon interaction. W…
Polaron formation as the vertex function problem: From Dyck's paths to self-energy Feynman diagrams
Tomislav Miškić, Juraj Krsnik, Stefano Ragni +2
We present an iterative method for generating the complete set of self-energy Feynman diagrams at arbitrary order for the single-polaron problem with arbitrary linear coupling to t…
Importance of coupling strength in shaping electron energy loss and phonon spectra of phonon-plasmon systems
J. Krsnik, O. S. Barišić
A systematic analysis of phonon-plasmon coupled excitations in three-dimensional (3D) polar systems is provided through the prism of both raw and integrated electron energy loss sp…
Many-body localization as a percolation phenomenon
P. Prelovšek, M. Mierzejewski, J. Krsnik +1
We examine the standard model of many-body localization (MBL), i.e., the disordered chain of interacting spinless fermions, by representing it as the network in the many-body (MB)…
Manifestations of the electron-phonon interaction range in angle resolved photoemission spectra
J. Krsnik, V. N. Strocov, N. Nagaosa +4
Numerous angle resolved photoemission spectroscopy (ARPES) studies of a wide class of low-density metallic systems, ranging from doped transition metal oxides to quasi two-dimensio…
Reduced-basis approach to many-body localization
Peter Prelovšek, Osor S. Barišić, Marcin Mierzejewski
Within the standard model of many-body localization, i.e., the disordered chain of spinless fermions, we investigate how the interaction affects the many-body states in the basis o…
Density correlations and transport in models of many-body localization
P. Prelovšek, M. Mierzejewski, O. Barišić +1
We present a review of recent theoretical results concerning the many-body localization (MBL) phenomenon, with the emphasis on dynamical density correlations and transport quantiti…
Absence of full many-body localization in the disordered Hubbard chain
P. Prelovšek, O. S. Barišić, M. Žnidarič
We present numerical results within the one-dimensional disordered Hubbard model for several characteristic indicators of the many-body localization (MBL). Considering traditionall…
Dynamical conductivity and its fluctuations along the crossover to many-body localization
Osor S. Barišić, Jure Kokalj, Ivan Balog +1
We present a numerical study of the many-body localization (MBL) phenomenon in the high-temperature limit within an anisotropic Heisenberg model with random local fields. Taking th…
Multiband responses in high-Tc cuprate superconductors
G. Nikšić, I. Kupčić, O. S. Barišić +2
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…
Large Ud theory for metallic high-Tc cuprates
S. Barišić, O. S. Barišić
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…
Conductivity in a disordered one-dimensional system of interacting fermions
O. S. Barišić, P. Prelovšek
Dynamical conductivity in a disordered one-dimensional model of interacting fermions is studied numerically at high temperatures and in the weak-interaction regime in order to find…
Bipolarons and polarons in the Holstein-Hubbard model: Analogies and differences
O. S. Barišić, S. Barišić
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 phy…
Thermal transport in a spin-1/2 Heisenberg chain coupled to a (non) magnetic impurity
A. Metavitsiadis, X. Zotos, O. S. Barišić +1
We explore the effect of a (non) magnetic impurity on the thermal transport of the spin-1/2 Heisenberg chain model. This unique system allows to probe Kondo-type phenomena in a pro…
Incoherent transport induced by a single static impurity in a Heisenberg chain
O. S. Barisic, P. Prelovsek, A. Metavitsiadis +1
The effect of a single static impurity on the many-body states and on the spin and thermal transport in the one-dimensional anisotropic Heisenberg chain at finite temperatures is s…
Slave fermion approach to the metallic phase in large high-T cuprates
S. Barisic, O. S. Barisic
Atomic repulsion on the Cu site in high T cuprates is large but, surprisingly, some important properties are consistent with moderate couplings. The time dependent pertur…
Phase diagram of the Holstein polaron in one dimension
O. S. Barisic, S. Barisic
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 c…
Diagrammatic content of the DMFT for the Holstein polaron problem in finite dimensions
O. S. Barisic
In the context of the Holstein polaron problem it is shown that the dynamical mean field theory (DMFT) corresponds to the summation of a special class of local diagrams in the skel…
Relevant coherent states method for the quantum adiabatic dynamics of lattice-coupled charge carriers
O. S. Barisic
A new numerical method is proposed for determining the low-frequency dynamics of the charge carrier coupled to the deformable quantum lattice. As an example, the polaron band struc…
Quantum adiabatic polarons by translationally invariant perturbation theory
O. S. Barisic, S. Barisic
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…
Holstein light quantum polarons
O. S. Barisic
The polaron formation is investigated in the intermediate regime of the Holstein model by using an exact diagonalization technique for the one-dimensional infinite lattice. The num…