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31 papers · 2 filters
Lithographic engineering of anisotropies in (Ga,Mn)As
S. Hümpfner, M. Sawicki, K. Pappert +6
The focus of studies on ferromagnetic semiconductors is moving from material issues to device functionalities based on novel phenomena often associated with the anisotropy properti…
Transport Characterization of the Magnetic Anisotropy of (Ga,Mn)As
K. Pappert, S. Hümpfner, J. Wenisch +4
The rich magnetic anisotropy of compressively strained (Ga,Mn)As has attracted great interest recently. Here we discuss a sensitive method to visualize and quantify the individual…
Semiclassical Approach to Chaotic Quantum Transport
Sebastian Müller, Stefan Heusler, Petr Braun +1
We describe a semiclassical method to calculate universal transport properties of chaotic cavities. While the energy-averaged conductance turns out governed by pairs of entrance-to…
Bound states in the continuum in open Aharonov-Bohm rings
Evgeny N. Bulgakov, Konstantin N. Pichugin, Almas F. Sadreev +1
Using formalism of effective Hamiltonian we consider bound states in continuum (BIC). They are those eigen states of non-hermitian effective Hamiltonian which have real eigen value…
Landau level mixing in the nu=5/2 fractional quantum Hall state
Arkadiusz Wojs, John J. Quinn
The nu=5/2 fractional quantum Hall state is studied numerically, directly including the effects of electron scattering between neighboring Landau levels. Significant reduction of t…
Effect of free carriers and impurities on density of states and optical spectra of two-dimensional magneto-excitons
Anna Gladysiewicz, Leszek Bryja, Arkadiusz Wojs +1
Density of states (DOS) and absorption spectrum of weakly doped, narrow quantum wells in high magnetic fields are calculated by realistic exact diagonalization. The systems contain…