Difference between far-infrared photoconductivity spectroscopy and absorption spectroscopy: theoretical evidence of the electron reservoir mechanism

Authors

Tadashi Toyoda, Tokai University
Maho Fujita, Tokai University
Tomohisa Uchida, Tokai University
Nobuyoshi Hiraiwa, Fujitsu Component Limited
Taturo Fukuda, Japan Electronics College
Hideki Koizumi, Nippon Gear Co., Ltd
Chao Zhang, University of WollongongFollow

RIS ID

81539

Publication Details

Toyoda, T., Fujita, M., Uchida, T., Hiraiwa, N., Fukuda, T., Koizumi, H. & Zhang, C. (2013). Difference Between Far-Infrared Photoconductivity Spectroscopy and Absorption Spectroscopy: Theoretical Evidence of the Electron Reservoir Mechanism. Physical Review Letters, 111 (8), 086801-1-086801-4.

Abstract

The intriguing difference between far-infrared photoconductivity spectroscopy and absorption spectroscopy in the measurement of the magnetoplasmon frequency in GaAs quantum wells reported by Holland et al. [Phys. Rev. Lett. 93, 186804 (2004)] remains unexplained to date. This Letter provides a consistent mechanism to solve this puzzle. The mechanism is based on the electron reservoir model for the integer quantum Hall effect in graphene [Phys. Lett. A 376, 616 (2012)]. We predict sharp kinks to appear in the magnetic induction dependence of the magnetoplasmon frequency at very low temperatures such as 14 mK in the same GaAs quantum well sample used by Holland et al..