Band structure of ZnO from resonant x-ray emission spectroscopy (2008)
Preston, A. R. H., Ruck, B. J., Piper, L. F. J., DeMasi, A., Smith, K. E., Schleife, A., ...
Soft x-ray emission and absorption spectroscopy of the O K-edge are employed to investigate the electronic structure of wurtzite ZnO(0001). A quasiparticle band structure calculated within the GW...
Fuchs, F., Rödl, C., Schleife, A., Bechstedt, F.
Excitonic effects in optical spectra and electron-hole pair excitations are described by solutions of the Bethe-Salpeter equation (BSE) that accounts for the Coulomb interaction of excited...
Surface influence on stability and structure of III-V nanorods: First-principles studies (2006)
We report ab initio investigations of hexagon-shaped, [111]/[0001] oriented III-V semiconductor nanowires with varying crystal structure, surface passivation, surface orientation, and diameter. Their...
GW band structure of InAs and GaAs in the wurtzite phase (2006)
Zanolli, Z., Fuchs, F., Furthmueller, J., Von Barth, U., Bechstedt, F.
We report the first quasiparticle calculations of the newly observed wurtzite polymorph of InAs and GaAs. The calculations are performed in the GW approximation using plane waves and...
Schleife, A., Fuchs, F., Furthmüller, J., Bechstedt, F.
An ab initio pseudopotential method based on density functional theory, generalized gradient corrections to exchange and correlation, and projector-augmented waves is used to investigate structural,...
Quasiparticle band structure based on a generalized Kohn-Sham scheme (2006)
Fuchs, F., Furthmüller, J., Bechstedt, F., Shishkin, M., Kresse, G.
We present a comparative full-potential study of generalized Kohn-Sham schemes (gKS) with explicit focus on their suitability as starting point for the solution of the quasiparticle equation. We...
Cappellini, G., Weissker, H-Ch, De Salvador, D., Furthmüller, J., Bechstedt, F., Satta, G., ...
We discuss and test a combined method to efficiently perform ground-state and excited-state calculations for relaxed structures using both a quantum first-principles approach and a classical...
Zener tunneling in superlattices in a magnetic field (2002)
Meinhold, D., Leo, K., Fromer, N.A., Chemla, D.S., Glutsch, S., Bechstedt, F., ...
We present a study of the Zener effect in the optical absorption of strongly coupled superlattices with both a magnetic and an electric field in growth direction. The in-plane continuum of electron...
Nonlinear transport in superlattices: Bloch oscillations and Zener breakdown (2001)
Löser, F., Rosam, B., Meinhold, D., Lyssenko, V.G., Sudzius, M., Dignam, M.M., ...
Semiconductor superlattices have been intensively used as a model system for the investigation of high field transport in solids. Here, we discuss ultrafast optical experiments which allow us to...
Field-induced delocalization and Zener breakdown in semiconductor superlattices (2001)
Rosam, B., Meinhold, D., Löser, F., Lyssenko, V., Leo, K., Glutsch, S., ...
We investigate the energy spectrum and the electron dynamics of a band in a semiconductor superlattice as a function of the electric field. Linear optical spectroscopy shows that, for high fields,...
Field-induced delocalization and zener breakdown in semiconductor superlattices (2000)
Rosam, B., Meinhold, D., Löser, F., Lyssenko, V., Leo, K., Glutsch, S., ...
We investigate the electronic structure in strongly coupled superlattices over a wide field range. It is shown that die Wannier-Stark localization is followed by a field-induced delocalization which...
Ab initio calculation of linear and nonlinear optical properties of semiconductor structures (1999)
Bechstedt,F., Adolph,B., Schmidt,W. G.
The theoretical and numerical approaches are discussed for ab initio calculations of optical properties. The density functional theory (DFT) combined with the local-density approximation (LDA) allows...
Field-induced delocalization and zener breakdown in semiconductor superlattices (1999)
Rosam, B., Löser, F., Lyssenko, V., Leo, K., Glutsch, S., Bechstedt, F., ...
We investigate the electronic structure in strongly coupled superlattices over a wide field range. It is shown that the Wannier-Stark localization is followed by a field-induced delocalization which...
Electronic Excitations and Stability of the Ground State of C60 Molecules (1998)
Bechstedt, F., Fiedler, M., Sham, L. J.
A model study of the singlet excitons in the C60 molecule with emphasis on the Coulomb interaction between excited electron and hole leads to a physical understanding of the interaction effects on...
Reflectance anisotropy of GaAs(100): Theory and experiment (1998)
Shkrebtii,A. I., Esser,N., Richter,W., Schmidt,W. G., Bechstedt,F., Fimland,B. O., ...
Reflectance anisotropy of GaAs(100): Theory and experiment (1998)
Shkrebtii, A. I., Esser, N., Richter, W., Schmidt, W. G., Bechstedt, F., Fimland, B. O., ...
Raman spectra of isotopic GaN. (1997)
Zhang, J., Ruf, T., Cardona, M., Ambacher, O., Stutzmann, M., ...
Excitons in quantum disks and disk arrays (1993)
Glutsch, S., Adolph, B., Bechstedt, F.
We present a theory which describes the influcence of the Coulomb attraction on the optical spectra for quantum dots within the envelope function formalism. Starting from a generalized non-local...
Excitons in quantum disks and disk arrays (1993)
Glutsch, S., Adolph, B., Bechstedt, F.
We present a theory which describes the influcence of the Coulomb attraction on the optical spectra for quantum dots within the envelope function formalism. Starting from a generalized non-local...
Excitons in quantum disks and disk arrays (1993)
Glutsch, S., Adolph, B., Bechstedt, F.
We present a theory which describes the influcence of the Coulomb attraction on the optical spectra for quantum dots within the envelope function formalism. Starting from a generalized non-local...