Akimov, A. V., Scherbakov, A. V., Yakovlev, D. R., Merkulov, I. A., Bayer, M., Waag, A., ...
The magnetization kinetics in (Zn,Mn)Se/(Zn,Be)Se quantum wells has been studied on a ps-time scale after pulsed laser excitation. The magnetization induced by an external magnetic field is reduced...
Stimulated emission from ZnO nanorods (2006)
Hauschild, R., Lange, H., Priller, H., Klingshirn, C., Kling, R., Waag, A., ...
Keller, D., Yakovlev, D. R., Astakhov, G. V., Ossau, W., Crooker, S. A., Slobodskyy, T., ...
The optical properties of two-dimensional electron gases in ZnSe/(Zn,Be)Se and ZnSe/(Zn,Be,Mg)Se modulation-doped quantum wells with electron densities up to 1.4x10^{12} cm^{-2} were studied by...
Kneip, M. K., Yakovlev, D. R., Bayer, M., Maksimov, A. A., Tartakovskii, I. I., Keller, D., ...
The dynamics of spin-lattice relaxation of the Mn-ions in (Zn,Mn)Se-based diluted-magnetic-semiconductor quantum wells is studied by time-resolved photoluminescence. The spin-lattice relaxation time...
Effect of annealing on the depth profile of hole concentration in (Ga,Mn)As (2005)
Limmer, W., Koeder, A., Frank, S., Avrutin, V., Schoch, W., Sauer, R., ...
The effect of annealing at 250 C on the carrier depth profile, Mn distribution, electrical conductivity, and Curie temperature of (Ga,Mn)As layers with thicknesses > 200 nm, grown by molecular-beam...
Electron cyclotron mass in undoped CdTe/CdMnTe quantum wells (2005)
Dremin, A. A., Yakovlev, D. R., Sirenko, A. A., Gubarev, S. I., Shabelsky, O. P., Waag, A., ...
Optically detected cyclotron resonance of two-dimensional electrons has been studied in nominally undoped CdTe/(Cd,Mn)Te quantum wells. The enhancement of carrier quantum confinement results in an...
Spin control in heteromagnetic nanostructures (2004)
Scherbakov, A. V., Akimov, A. V., Yakovlev, D. R., Ossau, W., Hansen, L., Waag, A., ...
The rapidly expanding research in Spintronics, the electronics utilizing the electron spin instead of its charge, is driven by the very interesting potential applications. The actual task is to...
Konemann, J., Maude, D. K., Avrutin, V., Waag, A., Haug, R. J.
We present measurements of a single-particle transport spectrum of a vertical GaAs/AlGaAs resonant tunneling device at high magnetic fields. We investigated the spin splitting of several quantum dot...
Growth of GaMnAs under near-stoichiometric conditions (2003)
Avrutin, V., Humienik, D., Frank, S., Koeder, A., Schoch, W., Limmer, W., ...
We studied the effect of the V/III flux ratio and substrate temperature on magnetotransport properties and lattice parameters of Ga0.96Mn0.04As grown by molecular beam epitaxy. For all the substrate...
Enhancement of the Curie temperature in GaMnAs/InGaMnAs superlattices (2003)
Koeder, A., Limmer, W., Frank, S., Schoch, W., Avrutin, V., Sauer, R., ...
We report on an enhancement of the Curie temperature in GaMnAs/InGaMnAs superlattices grown by low-temperature molecular beam epitaxy, which is due to thin InGaMnAs or InGaAs films embedded into the...
Electronic and magnetic properties of GaMnAs: Annealing effects (2003)
Limmer, W., Koeder, A., Frank, S., Glunk, M., Schoch, W., Avrutin, V., ...
The effect of short-time and long-time annealing at 250C on the conductivity, hole density, and Curie temperature of GaMnAs single layers and GaMnAs/InGaMnAs heterostructures is studied by in-situ...
Magneto-PL study of donors in ZnO substrates (2003)
Thonke, K., Kerwien, N., Wysmolek, A., Potemski, M., Waag, A., Sauer, R.
Curie temperature and carrier concentration gradients in MBE grown GaMnAs layers (2002)
Koeder, A., Frank, S., Schoch, W., Avrutin, V., Limmer, W., Thonke, K., ...
We report on detailed investigations of the electronic and magnetic properties of ferromagnetic GaMnAs layers, which have been fabricated by low-temperature molecular-beam epitaxy. Superconducting...
Semimagnetic Resonant Tunneling Diodes for Electron Spin Manipulation (2002)
Gruber, Th., Keim, M., Fiederling, R., Reuscher, G., Waag, A.
Recently, efficient electrical injection of spin polarized electrons into GaAs bas been accomplished by using a semimagnetic II-VI single layer, namely BeMnZnSe, as a spin aligner. In such spin...
Binding energy of charged excitons in ZnSe-based quantum wells (2002)
Astakhov, G. V., Yakovlev, D. R., Kochereshko, V. P., Ossau, W., Faschinger, W., Puls, J., ...
Binding Energy of Charged Excitons in ZnSe-based Quantum Wells (2001)
Astakhov, G. V., Yakovlev, D. R., Kochereshko, V. P., Ossau, W., Puls, J., Henneberger, F., ...
Excitons and charged excitons (trions) are investigated in ZnSe-based quantum well structures with (Zn,Be,Mg)Se and (Zn,Mg)(S,Se) barriers by means of magneto-optical spectroscopy. Binding energies...
Hansen, L., Ferrand, D., Richter, G., Thierley, M., Hock, V., Schwarz, N., ...
We report on the MBE-growth and magnetotransport properties of p-type BeMnTe, a new ferromagnetic diluted magnetic semiconductor. BeMnTe thin film structures can be grown almost lattice matched to...
II-VI quantum structures with tunable electron g-factor (2000)
Wojtowicz, T., Kutrowski, M., Karczewski, G., Kossut, J., Konig, B., Keller, A., ...
VUV ellipsometry on beryllium chalcogenides. (1999)
Wilmers, K., Wethkamp, T., Esser, N., Cobet, C., Richter, W., Wagner, V., ...
The band structure of BeTe - a combined experimental and theoretical study (1997)
Nagelstra\ss{}er, M., Dröge, H., Litz, T., Waag, A., Fleszar, G. Landwehr A., ...
Using angle-resolved synchrotron-radiation photoemission spectroscopy we have determined the dispersion of the valence bands of BeTe(100) along $\Gamma X$, i.e. the [100] direction. The measurements...
Combined exciton-cyclotron resonance in quantum well structures (1997)
Maan, J.C., Christianen, P.C.M., Landwehr, G., Waag, A., Ossau, W., Schenk, H., ...
Optical study of interdiffusion in CdTe and ZnSe based quantum wells (1994)
Tönnies, D., Bacher, G., Forchel, Alfred, Waag, A., Litz, Th., Hommel, D., ...
Removal of oxygen and reduction of carbon contamination on (100) Cd_0.96Zn_0.04Te (1993)
Wu, Y. S., Becker, Charles R., Waag, A., Bicknell-Tassius, R. N., Landwehr, G.
Growth of MgTe and Cd_1-xMgxTe thin films by molecular beam epitaxy (1993)
Waag, A., Heinke, H., Scholl, S., Becker, Charles R., Landwehr, G.
We report on the growth of the compound semiconductor MgTe as weil as the ternary alloy Cd l ~xMg,Tc by molecular hcam cpitaxy. This is to our knowkdgc thc first time that this material has heen...
Oxygen on the (100) CdTe surface (1993)
Wu, Y. S., Becker, Charles R., Waag, A., Schmiedl, R., Einfeldt, S., Landwehr, G.
We have investigated oxygen on CdTe substrates by means of x-ray photoelectron spectroscopy (XPS) and reflection high-energy electron diffraction (RHEED). A Te oxide layer that was at least 15 A...
Surface sublimation of zinc blende CdTe (1993)
Wu, Y. S., Becker, Charles R., Waag, A., Von Schierstedt, K., Bicknell-Tassius, R. N., Landwehr, G.
The surface sublimation of Cd and Te atoms from the zinc blende (111)A CdTe surface has been investigated in detail by reflection high energy electron diffraction and x-ray photoelectron...
Wu, Y. S., Becker, Charles R., Waag, A., Bicknell-Tassius, R. N., Landwehr, G.
The influence of different CdZnTe substrate treatments prior to II-VI molecular beam epitaxial growth on surface stoichiometry, oxygen, and carbon contamination has been studied using x-ray...
Wu, Y. S., Becker, Charles R., Waag, A., Bicknell-Tassius, R. N., Landwehr, G.
We report the results of a detailed investigation on the Te-stabilized (2 x 1) and the Cdstabilized c( 2 X 2) surfaces of ( 100) CdTe substrates. The investigation demonstrates for the first time...
Correlation of the Cd-to-Te ratio on CdTe surfaces with the surface structure (1991)
Wu, Y.S., Becker, Charles R., Waag, A., Kraus, M. M., Bicknell-Tassius, R. N., Landwehr, G.
We report here that reconstruction on (100), (1lIlA, and (1l1lB CdTe surfaces is either C(2X2), (2X2), and (l X I) or (2X I), (l X I), and (l X I) when they are Cd or Te stabilized, respectively....