Calculation of terahertz conductivity spectra in semiconductors with nanoscale modulation

0380660 - FZÚ 2013 RIV US eng J - Článek v odborném periodiku
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 ostatní: AV ČR(CZ) M100101218
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: terahertz spectroscopy * semiconductor nanostructures * far-infrared conductivity
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 3.767, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0211307