Trapping electrons in electrostatic traps over the surface of helium

Details Trapping electrons in electrostatic traps over the surface of helium Trapping electrons in electrostatic traps over the surface of helium

2006-11-29

arxiv.org/abs/cond-mat/0611756v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Presented at QFS06 - Kyoto, to be published in J. Low Temp. Phys., 6 pages, 3 figures

Scientific paper

10.1007/s10909-007-9368-z

We have observed trapping of electrons in an electrostatic trap formed over the surface of liquid helium-4. These electrons are detected by a Single Electron Transistor located at the centre of the trap. We can trap any desired number of electrons between 1 and $\sim 30$. By repeatedly ($\sim 10^3-10^4$ times) putting a single electron into the trap and lowering the electrostatic barrier of the trap, we can measure the effective temperature of the electron and the time of its thermalisation after heating up by incoherent radiation.

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