Zobrazeno 1 - 10
of 297
pro vyhledávání: '"Czycholl, G."'
In the literature on electron-phonon scatterings very often a phenomenological expression for the transition matrix element is used which was derived in the textbooks of Ashcroft/Mermin and of Czycholl. There are various steps in the derivation of th
Externí odkaz:
http://arxiv.org/abs/1511.03521
We present an $sp^3$ tight-binding model for the calculation of the electronic and optical properties of wurtzite semiconductor quantum dots (QDs). The tight-binding model takes into account strain, piezoelectricity, spin-orbit coupling and crystal-f
Externí odkaz:
http://arxiv.org/abs/0802.2436
The electronic and optical properties of self-assembled InN/GaN quantum dots (QDs) are investigated by means of a tight-binding model combined with configuration interaction calculations. Tight-binding single particle wave functions are used as a bas
Externí odkaz:
http://arxiv.org/abs/cond-mat/0612353
In this work we investigate the electronic and optical properties of self-assembled InN/GaN quantum dots. The one-particle states of the low-dimensional heterostructures are provided by a tight-binding model that fully includes the wurtzite crystal s
Externí odkaz:
http://arxiv.org/abs/cond-mat/0509545
Autor:
Schumacher, S., Czycholl, G., Jahnke, F., Kudyk, I., Wischmeier, L., Rückmann, I., Voss, T., Gutowski, J., Gust, A., Hommel, D.
The influence of coherent optical nonlinearities on polariton propagation effects is studied within a theory-experiment comparison. A novel approach that combines a microscopic treatment of the boundary problem in a sample of finite thickness with ex
Externí odkaz:
http://arxiv.org/abs/cond-mat/0504096
Autor:
Anders, Frithjof B., Czycholl, G.
Publikováno v:
Phys. Rev. B 71, 125101 (2005)
The f-electron spectral function of the Falicov-Kimball model is calculated within the dynamical mean-field theory using the numerical renormalization group method as the impurity solver. Both the Bethe lattice and the hypercubic lattice are consider
Externí odkaz:
http://arxiv.org/abs/cond-mat/0411721
Unscreened Hartree-Fock approximation (HFA) calculations for metallic Fe, Co, Ni, and Cu are presented, by using a quantum-chemical approach. We believe that these are the first HFA results to have been done for crystalline 3d transition metals. Our
Externí odkaz:
http://arxiv.org/abs/cond-mat/0307658
The ab-initio many-body method suggested in the preceding paper is applied to the 3d transition metals Fe, Co, Ni, and Cu. We use a linearized muffin-tin orbital calculation to determine Bloch functions for the Hartree one-particle Hamiltonian, and f
Externí odkaz:
http://arxiv.org/abs/cond-mat/0304645
We propose a new, alternative method for ab-initio calculations of the electronic structure of solids, which has been specifically adapted to treat many-body effects in a more rigorous way than many existing ab-initio methods. We start from a standar
Externí odkaz:
http://arxiv.org/abs/cond-mat/0304643
Temperature dependence S(T) of the thermoelectric power of metallic systems with cerium and ytterbium ions exhibits some characteristic features, which can be used to classify these systems into distinct categories. The experimental data are explaine
Externí odkaz:
http://arxiv.org/abs/cond-mat/0110179