256 citations · 1.2k across the 19 of their papers we have counts for
20 papers
Spin Wave Driven Skyrmions in a Bipartite Antiferromagnetic Lattice
Michael Lau, Wolfgang Häusler, Michael Thorwart
We show that a Skyrmion in a classical bipartite antiferromagnetic lattice can be spatially displaced in a controlled manner by externally applied spin waves. We reveal the relatio…
Role of impurity clusters for the current-driven motion of magnetic Skyrmions
M. Stier, R. Strobel, W. Häusler +1
We study how impurities influence the current-induced dynamics of magnetic Skyrmions moving in a racetrack geometry. For this, we solve numerically the generalized Landau-Lifshitz-…
Skyrmion-Antiskyrmion pair creation by in-plane currents
Martin Stier, Wolfgang Häusler, Thore Posske +2
Magnetic skyrmions can be considered as topologically protected localized vortex-like spin textures. Due to their stability, their small size, and the possibility to move them by l…
Chiral interface states in graphene - junctions
L. Cohnitz, A. De Martino, W. Häusler +1
We present a theoretical analysis of unidirectional interface states which form near - junctions in a graphene monolayer subject to a homogeneous magnetic field. The semiclas…
Flat bands and long range Coulomb interactions: conducting or insulating?
Wolfgang Häusler
Dispersionless (flat) electronic bands are investigated regarding their conductance properties. Due to "caging" of carriers these bands are usually insulating at partial filling, a…
Current resonances in graphene with time dependent potential barriers
Sergey E. Savel'ev, Wolfgang Hausler, Peter Hanggi
A method is derived to solve the massless Dirac-Weyl equation describing electron transport in a mono-layer of graphene with a scalar potential barrier U(x,t), homogeneous in the y…
Josephson-like currents in graphene for arbitrary time-dependent potential barriers
Sergey E. Savel'ev, Wolfgang Hausler, Peter Hanggi
From the exact solution of the Dirac-Weyl equation we find unusual currents j_y running in y-direction parallel to a time-dependent scalar potential barrier W(x,t) placed upon a mo…
Barrier transmission of Dirac-like pseudospin-one particles
D. F. Urban, D. Bercioux, M. Wimmer +1
We address the problem of barrier tunneling in the two-dimensional T_3 lattice (dice lattice). In particular we focus on the low-energy, long-wavelength approximation for the Hamil…
Massless Dirac-Weyl Fermions in a T_3 Optical Lattice
D. Bercioux, D. F. Urban, H. Grabert +1
We propose an experimental setup for the observation of quasi-relativistic massless Fermions. It is based on a T_3 optical lattice, realized by three pairs of counter-propagating l…
Charge and spin dynamics of interacting Fermions in a one dimensional harmonic trap
Lars Kecke, Hermann Grabert, Wolfgang Häusler
We study an atomic Fermi gas interacting through repulsive contact forces in a one dimensional harmonic trap. Bethe-Ansatz solutions lead to an inhomogeneous Tomonaga-Luttinger mod…
Wigner molecules in quantum dots
Boris Reusch, Wolfgang Häusler, Hermann Grabert
We perform unrestricted Hartree-Fock (HF) calculations for electrons in a parabolic quantum dot at zero magnetic field. The crossover from Fermi liquid to Wigner molecule behavior…
Crossover from Fermi liquid to Wigner molecule behavior in quantum dots
R. Egger, W. Haeusler, C. H. Mak +1
The crossover from weak to strong correlations in parabolic quantum dots at zero magnetic field is studied by numerically exact path-integral Monte Carlo simulations for up to eigh…
Interacting electrons in polygonal quantum dots
C E Creffield, Wolfgang Haeusler, J H Jefferson +1
The low-lying eigenstates of a system of two electrons confined within a two-dimensional quantum dot with a hard polygonal boundary are obtained by means of exact diagonalization.…
Quantum dots and artificial atoms
John H. Jefferson, Wolfgang Häusler
The electronic properties of nanoscale quantum dots are reviewed. The similarities and differences between these `artificial atoms' and real atoms are discussed and, in particular,…
Non-linear current through a barrier in 1D wires with finite-range interactions
Margit Steiner, Wolfgang Häusler
The transport properties of a tunnel barrier in a one-dimensional wire are investigated at finite voltages and temperatures. We generalize the Luttinger model to account for finite…
Effective charge-spin models for quantum dots
John H. Jefferson, Wolfgang Häusler
It is shown that at low densities, quantum dots with few electrons may be mapped onto effective charge-spin models for the low-energy eigenstates. This is justified by defining a l…
Influence of spin on the persistent current of strongly interacting electrons
Wolfgang Häusler
The lowest eigenenergies of few, strongly interacting electrons in a one--dimensional ring are studied in the presence of an impurity barrier. The persistent current , perio…
Signatures of electron correlations in the transport properties of quantum dots
Kristian Jauregui, Wolfgang Häusler, Dietmar Weinmann +1
The transition matrix elements between the correlated and electron states of a quantum dot are calculated by numerical diagonalization. They are the central ingredien…
Nonlinear Transport Properties of Quantum Dots
W. Pfaff, D. Weinmann, W. Haeusler +3
The influence of excited levels on nonlinear transport properties of a quantum dot weakly coupled to leads is studied using a master--equation approach. A charging model for the do…
Coulombically Interacting Electrons in a One-dimensional Quantum Dot
Wolfgang Haeusler, Bernhard Kramer, PTB Braunschweig
The spectral properties of up to four interacting electrons confined within a quasi one--dimensional system of finite length are determined by numerical diagonalization including t…