منابع مشابه
Wigner Molecules in Nanostructures
The one– and two– particle densities of up to four interacting electrons with spin, confined within a quasi one–dimensional “quantum dot” are calculated by numerical diagonalization. The transition from a dense homogeneous charge distribution to a dilute localized Wigner–type electron arrangement is investigated. The influence of the long range part of the Coulomb interaction is studied. When t...
متن کاملStochastic interpretation of the Wigner transport in nanostructures
A stochastic interpretation of the quantum transport in nanoscale electronic devices is proposed. The Wigner potential is treated as a scattering source which determines the electron–potential interaction. A particle picture where each scattering event generates positive and negative particles is associated to the transport process. q 2003 Elsevier Science Ltd. All rights reserved.
متن کاملWigner molecules in polygonal quantum dots: A density-functional study
We investigate the properties of many-electron systems in two-dimensional polygonal ~triangle, square, pentagon, hexagon! potential wells by using the density-functional theory. The development of the ground-state electronic structure as a function of the dot size is of particular interest. First, we show that in the case of two electrons, the Wigner molecule formation agrees with previous exac...
متن کاملSymmetry breaking and Wigner molecules in few-electron quantum dots
We discuss symmetry breaking in two-dimensional quantum dots resulting from strong interelectron repulsion relative to the zero-point kinetic energy associated with the confining potential. Such symmetry breaking leads to the emergence of crystalline arrangements of electrons in the dot. The so-called Wigner molecules form already at field-free conditions. The appearance of rotating Wigner mole...
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ژورنال
عنوان ژورنال: Europhysics Letters (EPL)
سال: 1993
ISSN: 0295-5075,1286-4854
DOI: 10.1209/0295-5075/24/7/013