Magnetoplasmons excitations in graphene for filling factors $\nu \leq 6$ (2007)
In the frame of the Hartree-Fock approximation, the dispersion of magnetoplasmons in Graphene is derived for all types of transitions for filling factors $\nu\leq 6$. The optical conductivity...
Fractional minima in the conductivity of the quantum-Hall-system under microwaves (2005)
Apel, W., Bychkov, Yu. A., Weyrauch, M.
We analyse theoretically the conductivity of a quantum Hall system exposed to microwave radiation. We find that whenever microwave frequency and cyclotron frequency are commensurate, there is a {\em...
Massive Spin Collective Mode in Quantum Hall Ferromagnet (2003)
Maniv, T., Bychkov, Yu. A., Vagner, I. D.
It is shown that the collective spin rotation of a single Skyrmion in quantum Hall ferromagnet can be regarded as precession of the entire spin texture in the external magnetic field, with an...
Long Range Coherent Manipulation of Nuclear Spins in Quantum Hall Ferromagnet (2003)
Maniv, T., Bychkov, Yu. A., Vagner, I. D.
A coherent superposition of many nuclear spin states can be prepared and manipulated via the hyperfine interaction with the electronic spins by varying the Landau level filling factor through the...
Fast Incomplete Decoherence of Nuclear Spins in Quantum Hall Ferromagnet (2000)
Maniv, T., Bychkov, Yu. A., Vagner, I. D., Wyder, P.
A scenario of quantum computing process based on the manipulation of a large number of nuclear spins in Quantum Hall (QH) ferromagnet is presented. It is found that vacuum quantum fluctuations in the...
Nuclear Spin Relaxation for Higher Spin (2000)
We study the relaxation of a spin I that is weakly coupled to a quantum mechanical environment. Starting from the microscopic description, we derive a system of coupled relaxation equations within...
Spin relaxation in quantum Hall systems (1998)
We study the spin relaxation in an interacting two--dimensional electron gas in a strong magnetic field for the case that the electron density is close to filling just one Landau sub--level of one...
EUROPHYSICS LETTERS 1 December 1997 Europhys. Lett., 40 (5), pp. 557-562 (1997) (1997)
Two-dimensional electron gas (2DEG) under a strong perpendicular magnetic field in periodically modulated fields exhibits a peculiar discrete spectrum near the bottom of the spin-exciton band. The...
We study interacting electrons in two dimensions moving in the lowest Landau level under the condition that the Zeeman energy is much smaller than the Coulomb energy and the filling factor is one. In...