Electronic Structure near Impurities in the Chains of YBa₂Cu₃O_6+x

2001/06/28 by Dirk K. Morr, Alexander V. Balatsky, Morr, Dirk K. +1
Physics and Astronomy · #FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.cond-mat/0106616

4 pages, 4 figures

arxiv created 2001/06/28 · arxiv updated 2009/11/30

Abstract

We study the electronic structure near impurities in the one-dimensional chains of YBa₂Cu₃O_6+x. Assuming chain superconductivity below T_c due to a proximity coupling, we show that only a magnetic impurity induces resonance states in the local density of states. Its spatial structure reflects the particle-hole nature of chain superconductivity and thus distinguishes it from other broken symmetry phases. For a sufficiently large scattering strength, or due to interference effects arising from a second impurity, the chains undergo a quantum phase transition to a polarized state.

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