Zobrazeno 1 - 10
of 79
pro vyhledávání: '"Nuss, Martin"'
Recently solvers for the Anderson impurity model (AIM) working directly on the real-frequency axis have gained much interest. A simple and yet frequently used impurity solver is exact diagonalization (ED), which is based on a discretization of the AI
Externí odkaz:
http://arxiv.org/abs/1707.08841
A simple and efficient approximation scheme to study electronic transport characteristics of strongly correlated nano devices, molecular junctions or heterostructures out of equilibrium is provided by steady-state cluster perturbation theory. In this
Externí odkaz:
http://arxiv.org/abs/1505.01683
Publikováno v:
Phys. Rev. B 91, 085127 (2015)
We study the nonequilibrium formation of a spin screening cloud that accompanies the quenching of a local magnetic moment immersed in a Fermi sea at zero temperature. Based on high precision density matrix renormalization group results for the intera
Externí odkaz:
http://arxiv.org/abs/1409.0646
Publikováno v:
Phys. Rev. B 89, 165105 (2014)
We present a numerical method for the study of correlated quantum impurity problems out of equilibrium, which is particularly suited to address steady state properties within Dynamical Mean Field Theory. The approach, recently introduced in [Arrigoni
Externí odkaz:
http://arxiv.org/abs/1312.4586
Publikováno v:
Phys. Rev. B 89, 155139 (2014)
We study effects of electron-electron interactions on the steady-state characteristics of a hexagonal molecular ring in a magnetic field, as a model for a benzene molecular junction. The system is driven out of equilibrium by applying a bias voltage
Externí odkaz:
http://arxiv.org/abs/1307.7530
Autor:
Nuss, Martin, Aichhorn, Markus
Publikováno v:
Phys. Rev. B 89, 045125 (2014)
We investigate the electronic structure of the strongly anisotropic, quasi low dimensional purple bronze Li0.9Mo6O17. Building on all-electron ab-initio band structure calculations we obtain an effective model in terms of four maximally localized Wan
Externí odkaz:
http://arxiv.org/abs/1306.1074
Publikováno v:
Phys. Rev. B 88, 045132 (2013)
We study the time evolution and steady state of the charge current in a single-impurity Anderson model, using matrix product states techniques. A nonequilibrium situation is imposed by applying a bias voltage across one-dimensional tight-binding lead
Externí odkaz:
http://arxiv.org/abs/1301.3068
Autor:
Nuss, Martin, Heil, Christoph, Ganahl, Martin, Knap, Michael, Evertz, Hans Gerd, Arrigoni, Enrico, von der Linden, Wolfgang
Publikováno v:
Phys. Rev. B 86, 245119 (2012)
We calculate steady-state properties of a strongly correlated quantum dot under voltage bias by means of non-equilibrium Cluster Perturbation Theory and the non-equilibrium Variational Cluster Approach, respectively. Results for the steady-state curr
Externí odkaz:
http://arxiv.org/abs/1207.5641
Publikováno v:
Phys. Rev. B 85, 235107 (2012)
We study the single impurity Anderson model by means of cluster perturbation theory and the variational cluster approach (VCA). An expression for the VCA grand potential for a system in a non interacting bath is presented. Results for the single-part
Externí odkaz:
http://arxiv.org/abs/1110.4533
Publikováno v:
In Physica B: Physics of Condensed Matter 1 May 2018 536:254-258
