The movement of a one-dimensional Wigner solid explained by a modified Frenkel-Kontorova model

Wolfgang Quapp (), Jui-Yin Lin and Josep Maria Bofill
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Wolfgang Quapp: Mathematisches Institut, Universität Leipzig, PF 100920
Jui-Yin Lin: Quantum Dynamics Unit, Okinawa Institute of Science and Technology (OIST) Graduate University
Josep Maria Bofill: Departament de Química Inorgànica i Orgànica, Secció de Química Orgànica, and Institut de Química Teòrica i Computacional, (IQTCUB), Universitat de Barcelona

The European Physical Journal B: Condensed Matter and Complex Systems, 2020, vol. 93, issue 12, 1-18

Abstract: Abstract We propose a Frenkel-Kontorova model for a 1D chain of electrons forming a Wigner solid over 4He. It is a highly idealized picture, but with the model at hand we can study the movement of the chain. We find out that the energetically most preferable movement is the successive sliding of a kink or an antikink through the chain. Then the force for a movement does not depend on the length of the chain. The force uniformly applied to all electrons must be larger than a force exciting only a kink or an antikink. We calculate two cases, one with stiff ‘springs’ between the electrons and one with weak ‘springs’. The side potential of the ‘dimples’ is additionally damped at the periphery. We study the cases with 33, 66, and 101 particles. Graphical abstract

Keywords: Computational; Methods (search for similar items in EconPapers)
Date: 2020
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DOI: 10.1140/epjb/e2020-10421-x

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