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Phys Rev Lett. 2010 Oct 1;105(14):146403. Epub 2010 Sep 28.

Pair-density-wave correlations in the Kondo-Heisenberg model.

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1
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.

Abstract

We show, using density-matrix renormalization-group calculations complemented by field-theoretic arguments, that the spin-gapped phase of the one dimensional Kondo-Heisenberg model exhibits quasi-long-range superconducting correlations only at a nonzero momentum. The local correlations in this phase resemble those of the pair-density-wave state which was recently proposed to describe the phenomenology of the striped ordered high-temperature superconductor La(2-x)Ba(x)CuO₄, in which the spin, charge, and superconducting orders are strongly intertwined.

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