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37 papers · 1 filter
Convergence acceleration and stabilization for dynamical-mean-field-theory calculations
Rok Zitko
The convergence to the self-consistency in the dynamical-mean-field-theory (DMFT) calculations for models of correlated electron systems can be significantly accelerated by using a…
Bipolaron in the t-J model coupled to longitudinal and transverse quantum lattice vibrations
Lev Vidmar, Janez Bonca, Sadamichi Maekawa +1
We explore the influence of two different polarizations of quantum oxygen vibrations on the spacial symmetry of the bound magnetic bipolaron in the context of the t-J model by usin…
Spin Configuration in the 1/3 Magnetization Plateau of Azurite Determined by NMR
F. Aimo, S. Kramer, M. Klanjsek +3
High magnetic field Cu NMR spectra were used to determine the local spin polarization in the 1/3 magnetization plateau of azurite, Cu(CO)(OH), which is a…
Adaptive logarithmic discretization for numerical renormalization group methods
Rok Zitko
The problem of the logarithmic discretization of an arbitrary positive function (such as the density of states) is studied in general terms. Logarithmic discretization has arbitrar…
Splitting of the Kondo resonance in anisotropic magnetic impurities on surfaces
Rok Zitko, Robert Peters, Thomas Pruschke
Using the numerical renormalization group method, we study the splitting of the Kondo resonance by a magnetic field applied in different directions in the Kondo model for anisotrop…
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…