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Magnetotransport studies on single and coupled modulation‐doped quantum wires fabricated by cleaved edge overgrowth
Author(s) -
Wegscheider Werner,
Rother Martin,
Deutschmann Rainer,
Feil Thomas
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200642230
Subject(s) - condensed matter physics , luttinger liquid , quantum wire , commensurability (mathematics) , quantum , doping , enhanced data rates for gsm evolution , ballistic conduction , electron , modulation (music) , quantum point contact , conductivity , quantum well , physics , materials science , chemistry , quantum mechanics , laser , geometry , mathematics , computer science , acoustics , telecommunications
Cleaved Edge Overgrowth is employed to fabricate atomically precise single and coupled quantum wires. Single wires were investigated in the diffusive and ballistic transport regimes. In addition to a detailed understanding of the 1D sublevel structure in the complex CEO devices, clear indications of Luttinger liquid behavior of the one‐dimensional electron systems were obtained. Coupled quantum wires were studied in the two limits of large and small separations. In the first case shallow 1D potentials were chosen and an alternative description for commensurability oscillations in weakly modulated two‐dimensional electron systems could be derived. For the coupled quantum wires with small separations and a large potential modulation the validity of the miniband transport picture leading to negative differential conductivity was demonstrated. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)