Real-space multiband envelope-function approach without spurious solutions

Autor:	T. Eissfeller, P. Vogl
Rok vydání:	2011
Předmět:	Physics Mesoscopic physics Quantum dot Exciton Quantum mechanics Electronic structure Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Space (mathematics) Spurious relationship Representation (mathematics) Electronic Optical and Magnetic Materials Magnetic field
Zdroj:	Physical Review B. 84
ISSN:	1550-235X 1098-0121
Popis:	The envelope-function approach for mesoscopic electronic structure calculations is plagued by spurious solutions that originate in the ill representation of first-order derivatives in real-space bases. We present a symmetry-adapted finite element approach for multiband k · p envelope-function Hamiltonians that is manifestly free from spurious solutions, numerically efficient, and easy to implement. In addition, a gauge-invariant extension to this method is developed for problems involving magnetic fields. We predict the electrical exciton g-factor tuning in single InAs/GaAs embedded quantum dots to be significantly larger than previously found.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::91e3e7be86dbe0cc6d24c276007d917e https://doi.org/10.1103/physrevb.84.195122 Zobrazit plný text záznamu