Luttinger liquid superlattices

Details Luttinger liquid superlattices Luttinger liquid superlattices

2001-07-05

arxiv.org/abs/cond-mat/0107114v1

J. Phys.:Condens. Matter 13, L619 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

RevTeX, 5 pages, 3 figures

Scientific paper

10.1088/0953-8984/13/27/102

We calculate the correlation functions and the DC conductivity of Luttinger liquid superlattices, modeled by a repeated pattern of interacting and free Luttinger liquids. In a specific realization, where the interacting subsystem is a Hubbard chain, the system exhibits a rich phase diagram with four different phases: two metals and two compressible insulators. In general, we find that the effective low energy description amalgamates features of both types of liquids in proportion to their spatial extent, suggesting the interesting possibility of `engineered' Luttinger liquids.

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