336 citations · 2.1k across the 77 of their papers we have counts for
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Macrospin approximation and quantum effects in models for magnetization reversal
Mohammad Sayad, Daniel Gütersloh, Michael Potthoff
The thermal activation of magnetization reversal in magnetic nanoparticles is controlled by the anisotropy-energy barrier. Using perturbation theory, exact diagonalization and stab…
Krylov-space approach to the equilibrium and the nonequilibrium single-particle Green's function
Matthias Balzer, Nadine Gdaniec, Michael Potthoff
The zero-temperature single-particle Green's function of correlated fermion models with moderately large Hilbert-space dimensions can be calculated by means of Krylov-space techniq…
Self-energy-functional theory
Michael Potthoff
Self-energy-functional theory is a formal framework which allows to derive non-perturbative and thermodynamically consistent approximations for lattice models of strongly correlate…
Non-equilibrium cluster-perturbation theory
Matthias Balzer, Michael Potthoff
The cluster perturbation theory (CPT) is one of the simplest but systematic quantum cluster approaches to lattice models of strongly correlated electrons with local interactions. B…
Spin-spin correlations in ferromagnetic nanosystems
E. Y. Vedmedenko, N. Mikuszeit, T. Stapelfeldt +4
Using exact diagonalization, Monte-Carlo, and mean-field techniques, characteristic temperature scales for ferromagnetic order are discussed for the Ising and the classical anisotr…
Anomalous magnetic anisotropy of the topmost surface layer of Ni(110)
Marco Busch, Jens Lienemann, Michael Potthoff +1
The orientation of the magnetization of a Ni(110) surface was investigated using techniques with different probing depths. By making use of electron capture into excited states of…