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Calculation of terahertz conductivity spectra in semiconductors with nanoscale modulation
- 1.0380660 - FZÚ 2013 RIV US eng J - Journal Article
Mrozek, J. - Němec, Hynek
Calculation of terahertz conductivity spectra in semiconductors with nanoscale modulation.
Physical Review. B. Roč. 86, č. 7 (2012), "075308-1"-"075308-7". ISSN 1098-0121
Grant - others:AV ČR(CZ) M100101218
Institutional research plan: CEZ:AV0Z10100520
Keywords : terahertz spectroscopy * semiconductor nanostructures * far-infrared conductivity
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.767, year: 2012
Monte Carlo simulations are employed to calculate terahertz conductivity of charge carriers in a potential with periodic modulation on the nanoscale. The modulation gives rise to two characteristic features in the conductivity spectra: a Drude peak owing to charge carriers with kinetic energy exceeding the modulation depth, and resonance due to charge carriers localized around potentialminima. Both peaks shift in an appliedmagnetic field.We discuss the relationship between the modulation potential and the positions and strengths of the resonances. We also analyze the role of depolarization fields which are responsible for the difference between local and effective conductivity.
Permanent Link: http://hdl.handle.net/11104/0211307
Number of the records: 1