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The Hartree-Fock based diagonalization - an efficient algorithm for the treatment of interacting electrons in disordered solids
Michael Schreiber, Thomas Vojta
The Hartree-Fock based diagonalization is a computational method for the investigation of the low-energy properties of correlated electrons in disordered solids. The method is rela…
Localization and conductance in the quantum Coulomb glass
Thomas Vojta, Michael Schreiber
We consider the combined influence of disorder, electron-electron interactions and quantum hopping on the properties of electronic systems in a localized phase, approaching an insu…
Local versus Nonlocal Order Parameter Field Theories for Quantum Phase Transitions
D. Belitz, T. R. Kirkpatrick, Thomas Vojta
General conditions are formulated that allow to determine which quantum phase transitions in itinerant electron systems can be described by a local Landau-Ginzburg-Wilson or LGW th…
Superconductivity and Quantum Phase Transitions in Weak Itinerant Ferromagnets
T. R. Kirkpatrick, Thomas Vojta, D. Belitz +1
It is argued that the phase transition in low-T_c clean itinerant ferromagnets is generically of first order, due to correlation effects that lead to a nonanalytic term in the free…
Transport Anomalies and Marginal Fermi-Liquid Effects at a Quantum Critical Point
D. Belitz, S. L. Sessions, T. R. Kirkpatrick +3
The behavior of the conductivity and the density of states, as well as the phase relaxation time, of disordered itinerant electrons across a quantum ferromagnetic transition is dis…
Fock space localization, return probability, and conductance of disordered interacting electrons
Frank Epperlein, Svetlana Kilina, Michael Schreiber +2
We numerically simulate the low-energy properties of interacting electrons in a random potential using the Hartree-Fock based exact diagonalization method. In particular, we invest…