Electronic Structure near Impurities in the Chains of YBa$_2$Cu$_3$O$_{6+x}$

Dirk K. Morr; Alexander V. Balatsky

paper

Electronic Structure near Impurities in the Chains of YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$

arXiv:cond-mat/0106616

Abstract

We study the electronic structure near impurities in the one-dimensional chains of YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$ . 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.

4 pages, 4 figures

Electronic Structure near Impurities in the Chains of YBa2​Cu3​O6+x​

Abstract

Electronic Structure near Impurities in the Chains of YBa $_{2}$ Cu $_{3}$ O $_{6 + x}$