Volume 100, Number 1, October 2012
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||17 October 2012|
Incompressible edge wave in classical two-dimensional electron liquid on helium surface
1 Department of Physics, Graduate School of Sciences, Kyushu University - Fukuoka 812-8581, Japan
2 Research Center for Low Temperature and Materials Sciences, Kyoto University - Kyoto 606-8501, Japan
3 Department of Physics, Hyogo College of Medicine - Nishinomiya 663-8501, Japan
(a) Present address: Center of General Education, Tohoku Institute of Technology - Sendai 982-8577, Japan; firstname.lastname@example.org
Received: 21 July 2012
Accepted: 11 September 2012
The damping rates of edge magnetoplasmon (EMP) resonances in a two-dimensional electron system formed on a liquid-helium surface were measured at temperatures below 1.1 K and in perpendicular magnetic fields up to 6 T. By lowering the lateral confinement electric-field strength, we observed a clear evidence for an oscillation mode transformation from the conventional EMP into the coupled mode of EMP with the bounary displacement wave (BDW). It was found that the coupled BDW-EMP mode is characterized by strong damping. The damping rate enhancement in the coupled BDW-EMP mode is a manifestation of the incompressible motion of the classical electron liquid arising from strong electron correlation.
PACS: 73.20.-r – Electron states at surfaces and interfaces / 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
© EPLA, 2012
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