QFS2016 Book of Abstracts

Abstracts

P1.21 Melting and ordering of electrons on helium in a confined geometry Beysengulov Niyaz(1,2), Rees David(2,3), Teranishi Yoshiaki(3), Tayurskii Dmitrii(1,2), Lin Juhn-Jong(2,3), Kono Kimitoshi(1,2,3) 1) Kazan Federal University, Institute of Physics, KFU-RIKEN Joint Research Laboratory, Kazan, 420008 Russia. 2) RIKEN CEMS, Wako 351-0198, Japan. 3) National Chiao Tung University, Institute of Physics, NCTU-RIKEN Joint Research Laboratory, Hsinchu 300, Taiwan. Low-dimensional electron systems exhibit the enhancement of electron correlations when confined to narrow channels. Here we investigate the influence of confinement on the ordering of a quasi-1D electron system on the surface of liquid helium. We find that at weak confinement the melting of the Wigner Solid (WS) is determined by 2D Kosterlitz- Thouless theory. By contrast, at stronger confinement the melting of the WS depends on the confinement strength, as well as electron density and temperature. As the electron row number N y changes, varying commensurability results in a modulation of the WS order, even when N y is surprisingly large, which is confirmed by Monte Carlo simulations. P1.22 Computer simulation of quasi-1D electron system in parabolic confinement Beysengulov Niyaz(1,2), Lysogorskiy Yurii(1), Chepelianskii Alexei(4), Rees David(2,3), Kono Kimitoshi(1,2,3), Tayurskii Dmitrii(1,2) 1) Kazan Federal University, Institute of Physics, KFU-RIKEN Joint Research Laboratory, Kazan, 420008 Russia. 2) RIKEN CEMS, Wako 351-0198, Japan. 3) National Chiao Tung University, Institute of Physics, NCTU-RIKEN Joint Research Laboratory, Hsinchu 300, Taiwan. 4) Universit´e Paris-Sud, LPS, CNRS, UMR 8502, Orsay F-91405, France. Electrons bound to the surface of liquid helium form a model system in which the physics of strongly correlated particles interacting via Coulomb potential can be investigated. Here we present molecular dynamic study of strongly correlated electrons in an external parabolic confinement. We analyze the diffusion coefficient as well as velocity autocorrelation function dependence on the commensurability of Wigner Solid (WS). We show that melting of q1D-WS depends on the confinement strength.

33