Coherence and superconductivity in coupled one-dimensional chains: a case study of YBa₂Cu₃O_y

2005/04/11 by Y. S. Lee, Kouji Segawa, Yoichi Ando +1 · 1 citation
Physics and Astronomy · #cond-mat.supr-con #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.94.137004

published as PRL 94, 137004 (2005) · 4 pages, 3 figures

arxiv created 2005/04/11 · arxiv updated 2009/12/01

Abstract

We report the infrared (IR) response of Cu-O chains in the high-T_c superconductor YBa₂Cu₃O_y over the doping range spanning % y=6.28-6.75. We find evidence for a power law scaling at mid-IR frequencies consistent with predictions for Tomonaga-Luttinger liquid, thus supporting the notion of one-dimensional transport in the chains. We analyze the role of coupling to the CuO₂ planes in establishing metallicity and superconductivity in disordered chain fragments.

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