Zobrazeno 1 - 10
of 404
pro vyhledávání: '"Haeusler W"'
Publikováno v:
Phys. Rev. B 103, 054420 (2021)
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-Gilbert equation extended by the current-induced spin transfer torque.
Externí odkaz:
http://arxiv.org/abs/2011.06027
Publikováno v:
Phys. Rev. B 96, 140506 (2017)
We consider massless Dirac fermions in a graphene monolayer subject to both a perpendicular magnetic field $B$ and a proximity-induced pairing gap $\Delta$. When the chemical potential is at the Dirac point, our exact solution of the Bogoliubov-de Ge
Externí odkaz:
http://arxiv.org/abs/1708.02892
Publikováno v:
Phys. Rev. B 94, 165443 (2016)
We present a theoretical analysis of unidirectional interface states which form near $p$-$n$ junctions in a graphene monolayer subject to a homogeneous magnetic field. The semiclassical limit of these states corresponds to trajectories propagating al
Externí odkaz:
http://arxiv.org/abs/1608.03469
Publikováno v:
Phys. Rev. B 84, 115136 (2011)
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 Hamiltonian of the system, where the lattice can be described by a Dirac-li
Externí odkaz:
http://arxiv.org/abs/1106.2170
Publikováno v:
Phys. Rev. A 80, 063603 (2009)
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 lasers, filled with fermionic cold atoms. We show that in the long wave
Externí odkaz:
http://arxiv.org/abs/0909.3035
Publikováno v:
Phys. Rev. B 78, 165402 (2008)
Electronic waveguides in graphene formed by counterpropagating snake states in suitable inhomogeneous magnetic fields are shown to constitute a realization of a Tomonaga-Luttinger liquid. Due to the spatial separation of the right- and left-moving sn
Externí odkaz:
http://arxiv.org/abs/0807.2606
Publikováno v:
Phys. Rev. B 77, 081404(R) (2008)
We consider electron waveguides (quantum wires) in graphene created by suitable inhomogeneous magnetic fields. The properties of uni-directional snake states are discussed. For a certain magnetic field profile, two spatially separated counter-propaga
Externí odkaz:
http://arxiv.org/abs/0708.1876
We investigate possible nontrivial phases of a two-subband quantum wire. It is found that inter- and intra-subband interactions may drive the electron system of the wire into a gapped state. If the nominal electron densities in the two subbands are s
Externí odkaz:
http://arxiv.org/abs/cond-mat/9911286
Publikováno v:
Phys. Rev. Lett. 82, 3320 (1999); 83, 462(E) (1999)
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 eight electrons. By the use of a multilevel blocking algorithm, the simula
Externí odkaz:
http://arxiv.org/abs/cond-mat/9903111
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 dot is compared with a quantum mechanical model for interacting electron
Externí odkaz:
http://arxiv.org/abs/cond-mat/9306050