Pulsed transport of electrons on liquid helium confined in narrow channels

We have used a Source-Gate-Drain configuration with electrons on liquid helium (the Helium Field Effect Transistor "He-FET") to study the transport of "classical" electrons through narrow channels. The channels, formed by the split gate of the device, were between ten and a hundred μm long and several μm wide, and could be blocked completely by a negative bias voltage applied to the gate. In contrast to previous experiments, where the electron densities in source and drain were nearly the same and the system therefore was close to equilibrium, in the present measurement the drain was empty. The transport of the electrons through the channel was initiated by opening the gate with a short positive pulse with a duration down to nanoseconds, and the amount of electrons which passed during this time was registered. In this way, we could determine for the first time the transport properties of such a system on a nanosecond time scale and far off equilibrium. Measurements with varying gate voltage provide clear evidence for the formation of lanes of electrons in the channels.

Subject (DDC)

530 Physics

Keywords

Quantum gases, liquids and solids, Electronics and devices, Semiconductors

Cite This

ISO 690

SHABAN, Fatima, Thomas LORENZ, Richard RAU, Mohamed ASHARI, David REES, Kimitoshi KONO, Elke SCHEER, Paul LEIDERER, 2014. Pulsed transport of electrons on liquid helium confined in narrow channels. In: Journal of Physics : Conference Series. 568(1), 012008. ISSN 1742-6588. eISSN 1742-6596. Available under: doi: 10.1088/1742-6596/568/1/012008

BibTex

@article{Shaban2014Pulse-31126,
  year={2014},
  doi={10.1088/1742-6596/568/1/012008},
  title={Pulsed transport of electrons on liquid helium confined in narrow channels},
  number={1},
  volume={568},
  issn={1742-6588},
  journal={Journal of Physics : Conference Series},
  author={Shaban, Fatima and Lorenz, Thomas and Rau, Richard and Ashari, Mohamed and Rees, David and Kono, Kimitoshi and Scheer, Elke and Leiderer, Paul},
  note={Article Number: 012008}
}

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