470 citations · 1.6k across the 19 of their papers we have counts for
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Spin transport in Heisenberg antiferromagnets
Michael Sentef, Marcus Kollar, Arno P. Kampf
We analyze spin transport in insulating antiferromagnets described by the XXZ Heisenberg model in two and three dimensions. Spin currents can be generated by a magnetic-field gradi…
Phase separation in the particle-hole asymmetric Hubbard model
M. Eckstein, M. Kollar, M. Potthoff +1
The paramagnetic phase diagram of the Hubbard model with nearest-neighbor (NN) and next-nearest-neighbor (NNN) hopping on the Bethe lattice is computed at half-filling and in the w…
The number of permutations with a given number of sequences
Marcus Kollar
P(n,s) denotes the number of permutations of 1,2,...n that have exactly s sequences. Canfield and Wilf [math.CO/0609704] recently showed that P(n,s) can be written as a sum of s po…
Kinks in the dispersion of strongly correlated electrons
K. Byczuk, M. Kollar, K. Held +4
The properties of condensed matter are determined by single-particle and collective excitations and their interactions. These quantum-mechanical excitations are characterized by an…
Isosbestic points in the spectral function of correlated electrons
M. Eckstein, M. Kollar, D. Vollhardt
We investigate the properties of the spectral function A(omega,U) of correlated electrons within the Hubbard model and dynamical mean-field theory. Curves of A(omega,U) vs. omega f…