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71 papers · 1 filter
Applicability of the cumulant expansion method for the calculation of transport properties in electron-phonon systems
Petar Mitrić, Veljko Janković, Darko Tanasković +1
We assess the accuracy of the cumulant expansion (CE) method, combined with the independent-particle approximation (IPA), for calculating charge mobility in electron-phonon systems…
Quantum-classical study of charge transport in organic semiconductors with multiple low-frequency vibrational modes
Darko Tanasković, Maksim Makrushin, Petar Mitrić
Building on the recent success of a quantum-classical method for computing transport properties in the Holstein model with a single phonon mode [P. Mitrić et al., Phys. Rev. B ${\b…
Exact downfolding and its perturbative approximation
Jonas B. Profe, Jakša Vučičević, P. Peter Stavropoulos +3
Solving the many-electron problem, even approximately, is one of the most challenging and simultaneously most important problems in contemporary condensed matter physics with vario…
Towards numerically exact computation of conductivity in the thermodynamic limit of interacting lattice models
Jeremija Kovačević, Michel Ferrero, Jakša Vučičević
Computing dynamical response functions in interacting lattice models is a long standing challenge in condensed matter physics. In view of recent results, the dc resistivity $ρ_\mat…
Charge transport limited by nonlocal electron-phonon interaction. II. Numerically exact quantum dynamics in the slow-phonon regime
Veljko Janković
Transport of charge carriers in mechanically soft semiconductors is mainly limited by their interaction with slow intermolecular phonons. Carrier motion exhibits a crossover from s…
Charge transport limited by nonlocal electron-phonon interaction. I. Hierarchical equations of motion approach
Veljko Janković
Studying charge transport in models with nonlocal carrier--phonon interaction is difficult because it requires finite-temperature real-time correlation functions of mixed carrier--…