Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Alexander B. Dzyubenko"'
Publikováno v:
Annalen der Physik. 18:944-948
We study optically-induced collective excitations of graphene in the presence of a strong perpendicular magnetic field and a single impurity. We determine the energies and absorption strengths of these excitations, which become localised on the impur
Publikováno v:
International Journal of Modern Physics B. 21:1563-1567
We consider eigenstates and magneto-optical transitions of free and donor-bound spin-singlet and spin-triplet charged magnetoexcitons in quasi-two-dimensional quantum wells. We show that the bright singlet state remains always bound while spin-triple
Autor:
Alexander B. Dzyubenko
Publikováno v:
International Journal of Modern Physics B. 21:1476-1480
We discuss symmetry-driven squeezing and coherent states of few-particle systems in magnetic fields. An operator approach using canonical transformations and the SU(1,1) algebras is developed for considering Coulomb correlations in the lowest Landau
Autor:
Alexander B. Dzyubenko, A. S. Bracker, C. J. Meining, Joseph G. Tischler, Athos Petrou, V. R. Whiteside, B. D. McCombe, D. Gammon
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 26:158-162
We have performed optically detected resonance (ODR) spectroscopy on modulation-doped GaAs/AlGaAs quantum wells of different widths in which lateral fluctuations of the well width were purposely introduced by growth interruption at the interfaces. Th
Autor:
C. J. Meining, Alexander B. Dzyubenko, H. A. Nickel, Joseph G. Tischler, V. R. Whiteside, B. D. McCombe, Athos Petrou, Allan S. Bracker, D. Gammon
Publikováno v:
Acta Physica Polonica A. 106:383-393
Autor:
Dmitri R. Yakovlev, C. J. Meining, Madalina Furis, H. A. Nickel, Alexander B. Dzyubenko, B. D. McCombe, Athos Petrou
Publikováno v:
Solid State Communications. 127:821-827
Many body effects contribute significantly to the energy states of electron–hole pairs confined in quantum wells in the presence of excess electrons. We present results of optically detected resonance spectroscopy of the internal transitions of pho
Publikováno v:
physica status solidi (b). 227:365-379
The states of charged magnetoexcitons in two-dimensional systems are considered. Exact optical selection rules for intra- and inter-band processes are discussed. The effect of excess electrons on internal transitions of negatively charged excitons X
Autor:
Andreas Waag, Nikolai A. Gippius, Alexander B. Dzyubenko, W. Ossau, N. Miura, Dmitri R. Yakovlev, G. V. Astakhov, Scott A. Crooker, A. Yu. Sivachenko
Publikováno v:
physica status solidi (b). 227:353-363
Singlet and triplet states of negatively charged excitons (trions) in ZnSe/(Zn,Be,Mg)Se quantum wells have been studied by means of photoluminescence in pulsed magnetic fields up to 50 T. Singlet state binding energies, measured for different well wi
Autor:
Alexander B. Dzyubenko
Publikováno v:
Journal of Experimental and Theoretical Physics Letters. 74:318-322
A novel unitary transformation of the Hamiltonian that allows one to partially separate the center-of-mass motion for charged electron-hole systems in a magnetic field is presented. The two-mode squeezed oscillator states that appear at the intermedi
Autor:
H. A. Nickel, Joseph G. Tischler, B. D. McCombe, Andrey Yu. Sivachenko, B. A. Weinstein, R. J. Chen, Alexander B. Dzyubenko
Publikováno v:
Acta Physica Polonica A. 98:241-257
We review recent experimental advances by the Buffalo group in performing far-infrared magnetospectroscopy under he tuning of applied high hydrostatic pressure. Experiments are reported for the effects of pressure on Si donors in modulation doped GaA