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Title: Ground state structure and conductivity of quantum wires of infinite length and finite width.
Author: Malet i Giralt, Francesc
Pi Pericay, Martí
Barranco Gómez, Manuel
Lipparini, Enrico
Keywords: Semiconductors
Materials nanoestructurats
Nanostructured materials
Issue Date: 2005
Publisher: The American Physical Society
Abstract: We have studied the ground state structure of quantum strips within the local spin-density approximation, for a range of electronic densities between 5 104 and 2 106cm−1 and several strengths of the lateral confining potential. The results have been used to address the conductance G of quantum strips. At low density, when only one subband is occupied, the system is fully polarized and G takes a value close to 0.7 2e2 /h, decreasing with increasing electron density in agreement with experiments. At higher densities the system becomes paramagnetic and G takes a value near 2e2 /h, showing a similar decreasing behavior with increasing electron density. In both cases, the physical parameter that determines the value of the conductance is the ratio K/K0 of the compressibility of the system to the free one.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 2005, vol. 72, núm. 20, p. 205326-1-205326-10
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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