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Quantum Spin Hall Insulator State in HgTe Quantum Wells
Markus Koenig, Steffen Wiedmann, Christoph Bruene +5
Recent theory predicted that the Quantum Spin Hall Effect, a fundamentally novel quantum state of matter that exists at zero external magnetic field, may be realized in HgTe/(Hg,Cd…
Suppression of electron spin relaxation in Mn-doped GaAs
G. V. Astakhov, R. I. Dzhioev, K. V. Kavokin +7
We report a surprisingly long spin relaxation time of electrons in Mn-doped p-GaAs. The spin relaxation time scales with the optical pumping and increases from 12 ns in the dark to…
Bound magnetic polarons in the very dilute regime
Yu. G. Kusrayev, K. V. Kavokin, G. V. Astakhov +2
We study bound magnetic polarons (BMP) in a very diluted magnetic semiconductor CdMnTe by means of site selective spectroscopy. In zero magnetic field we detect a broad and asymmet…
On the character of states near the Fermi level in (Ga,Mn)As: impurity to valence band crossover
T. Jungwirth, Jairo Sinova, A. H. MacDonald +15
We discuss the character of states near the Fermi level in Mn doped GaAs, as revealed by a survey of dc transport and optical studies over a wide range of Mn concentrations. A ther…
Spin-polarized transport in II-VI magnetic resonant tunneling devices
David Sanchez, Charles Gould, Georg Schmidt +1
We investigate electronic transport through II-VI semiconductor resonant tunneling structures containing diluted magnetic impurities. Due to the exchange interaction between the co…
Bound hole states in a ferromagnetic (Ga,Mn)As environment
M. J. Schmidt, K. Pappert, C. Gould +3
A numerical technique is developed to solve the Luttinger-Kohn equation for impurity states directly in k-space and is applied to calculate bound hole wave functions in a ferromagn…