ICAMS / Interdisciplinary Centre for Advanced Materials Simulation


Structural Transitions in a Quasi-1D Wigner Solid on Liquid Helium

N. Beysengolov, D. Rees, Y. Lysogorskiy, N. Galiullin, A. Vazjukov, D. Tayurskii, K. Kono.

Journal of Low Temperature Physics, 182, 28, (2015)

a: Electron configuration for 6-row (top) and intermediate 6–7 row (bottom) structure in the simulation cell along with Voronoi tessellation areas for each electron, b: Structural diagram of electron rows against the linear electron density and c: Average electron–electron nearest-neighbour distance ⟨a⟩⟨a⟩ against the linear electron density.

We present a detailed study of structural transitions of an electron system on liquid helium in quasi-1D confinement geometry. The structural transitions are experimentally observed as current oscillations in transport measurements with changing electrostatic confinement parameters. Finite element modelling and Monte Carlo simulations were used to investigate the electron configuration. With increasing electron density, the single chain of electrons splits into a two-, three- and so on row configuration. A proliferation of defects accompanies each structural transition. We find a good agreement between the observed current modulation and the evolution of the electron row configuration predicted by our calculations.

Cite as: https://link.springer.com/article/10.1007/s10909-015-1344-4
DOI: 10.1007/s10909-015-1344-4
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