Electronic properties of quantum bars

Details Electronic properties of quantum bars Electronic properties of quantum bars

2001-12-10

arxiv.org/abs/cond-mat/0112169v3

Low Temp. Phys. v.28, 539 (2002) [Fiz. Nizk. Temp. v.28,752 (2002)]

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 2 figures

Scientific paper

Spectrum of boson fields and two-point correlators are analyzed in a quantum bar system (a superlattice formed by two crossed interacting arrays of quantum wires), with short range interwire interaction. The standard bosonization procedure is shown to be valid, within the two wave approximation. The system behaves as a sliding Luttinger liquid in the vicinity of the Gamma point, but its spectral and correlation characteristics have either 1D or 2D nature depending on the direction of the wave vector in the rest of the Brillouin zone. Due to interwire interaction, unperturbed states, propagating along the two arrays of wires, are always mixed, and the transverse components of the correlation functions do not vanish. This mixing is especially strong around the diagonal of the Brillouin zome, when tranverse correlators have the same order of magnitude as the longitudinal ones.

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