Excited-state Wigner crystals

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چکیده

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Excited-state Wigner crystals.

Wigner crystals (WCs) are electronic phases peculiar to low-density systems, particularly in the uniform electron gas. Since its introduction in the early twentieth century, this model has remained essential to many aspects of electronic structure theory and condensed-matter physics. Although the (lowest-energy) ground-state WC (GSWC) has been thoroughly studied, the properties of excited-state...

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We examine the dynamics of driven classical Wigner solids interacting with quenched disorder from charged impurities. For strong disorder, the initial motion is plastic, in the form of crossing winding channels. For increasing drive, there is a reordering into a moving Wigner smectic with the electrons moving in separate 1D channels. These different dynamic phases can be related to the conducti...

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Unrestricted Hartree-Fock theory of Wigner crystals

Wigner first predicted that a system of electrons in a uniform potential would crystallize at low densities. Localizing electrons around lattice sites increases their kinetic energy, but at sufficiently low densities the reduction in interaction energy is always greater. The Wigner crystal remains a theoretical prediction in three dimensions ~3D!, but in 2D Wigner crystals have been created on ...

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ژورنال

عنوان ژورنال: The Journal of Chemical Physics

سال: 2017

ISSN: 0021-9606,1089-7690

DOI: 10.1063/1.4974839