Electron Conductivity on Helium Films

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KLIER, Jürgen, Irena DOICESCU, Paul LEIDERER, Valeri SHIKIN, 2008. Electron Conductivity on Helium Films. In: Journal of Low Temperature Physics. 150(3/4), pp. 212-223. ISSN 0022-2291. eISSN 1573-7357

@article{Klier2008Elect-5357, title={Electron Conductivity on Helium Films}, year={2008}, doi={10.1007/s10909-007-9537-0}, number={3/4}, volume={150}, issn={0022-2291}, journal={Journal of Low Temperature Physics}, pages={212--223}, author={Klier, Jürgen and Doicescu, Irena and Leiderer, Paul and Shikin, Valeri} }

Electron Conductivity on Helium Films Leiderer, Paul Shikin, Valeri deposit-license 2011-03-24T14:55:13Z Klier, Jürgen Electrons on liquid helium films form a two-dimensional (2D) array with a wide range of electron density. This system is also very interesting for applications in restricted geometry. The conductivity σ of the electron arrays, however, strongly depends on the thickness d of the helium films adsorbed above solid substrates. This behaviour of σ is discussed in detail for a randomly rough substrate. It turns out that for the dependence of the conductivity σ(d) there exist three regions of helium thicknesses: d > dmin, d ∼ dmin, and d < dmin. Here dmin is the helium film thickness which corresponds to a relatively deep minimum of the 2D conductivity. In the first interval, d > dmin, a two-fraction scenario determines the behaviour of σ(d). In the vicinity of dmin percolation phenomena develop and the conductivity exhibits different types of the so-called dip effect. For even thinner helium films, i.e., when d < dmin, an activation type of mobility is stimulated. The presented model fits quite well to existing data of ac and dc electron mobility. application/pdf Klier, Jürgen Shikin, Valeri 2011-03-24T14:55:13Z Doicescu, Irena First publ. in: Journal of Low Temperature Physics, 150 (2008), 3/4, pp. 212 223 2008 Leiderer, Paul Doicescu, Irena eng

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