Surface acoustic wave attenuation by the localized states of a two-dimensional carrier system in a magnetic field

Autor:	Mohamed Henini, B Bracher, Christopher J. Mellor, V. W. Rampton, I Kennedy, C. T. Foxon, J. J. Harris
Rok vydání:	2001
Předmět:	Physics Condensed matter physics Filling factor Wave propagation Attenuation Surface acoustic wave Electron Quantum Hall effect Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic field Dispersion (optics) Materials Chemistry Electrical and Electronic Engineering
Zdroj:	Semiconductor Science and Technology. 16:136-139
ISSN:	1361-6641 0268-1242
DOI:	10.1088/0268-1242/16/3/302
Popis:	The surface acoustic wave attenuation and dispersion have been measured as a function of magnetic field for both a two-dimensional electron system and a two-dimensional hole system at frequencies between 100 and 1100 MHz. The experiments were made at 350 mK in the quantum Hall regime. In the region of filling factor one where the quasi-dc conductivity becomes very small, an attenuation and dispersion is found which we attribute to localized carrier states. We estimate that the relaxation time of the localized electrons is about 60 ps while the relaxation time for localized holes is about 20 ps.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::903312fc98d448511ff553527ddcdf27 https://doi.org/10.1088/0268-1242/16/3/302 Zobrazit plný text záznamu