期刊
PHYSICAL REVIEW B
卷 84, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.195122
关键词
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资金
- Deutsche Forschungsgemeinschaft [SFB 631, SPP 1285]
- Austrian Science Fund FWF (SFB IRON)
- Nanosystems Initiative Munich (NIM)
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) over right arrow . (p) over right arrow 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.
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