Low Temperature Physics: 37, 90 (2011); https://doi.org/10.1063/1.3552915 (4 pages)
Физика Низких Температур: Том 37, Выпуск 1 (Январь 2011), c. 108-111    ( к оглавлению , назад )

Microwave-induced magnetooscillations and absolute negative conductivity in the multisubband twodimensional electron system on liquid helium

Yu.P. Monarkha

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: monarkha@ilt.kharkov.ua

Received October 7, 2010


It is shown that a nonequilibrium filling of an upper surface subband induced by the microwave resonance can be the origin of the absolute negative conductivity and zero-resistance states for the two-dimensional electron system on liquid helium under magnetic field applied normally. Contrary to the similar effect reported for semiconductor systems, an oscillating sign-changing correction to the dc-magnetoconductivity appears due to quasi-elastic inter-subband scattering which does not involve photons. The analysis given explains remarkable magnetooscillations and zero-resistance states recently observed for electrons on liquid helium.

PACS: 73.40.–c Electronic transport in interface structures;
PACS: 73.20.–r Electron states at surfaces and interfaces;
PACS: 73.25.+i Surface conductivity and carrier phenomena;
PACS: 78.70.Gq Microwave and radio-frequency interactions.

Ключевые слова: magnetooscillations, surface electrons, negative conductivity, microwave resonance.