Quasiparticle States around a Nonmagnetic Impurity in a <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">d</mi></math></span>-Density-Wave State of High- <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></mrow></math></span> Cuprates

Jian-Xin Zhu; Wonkee Kim; C. S. Ting; J. P. Carbotte

doi:10.1103/PhysRevLett.87.197001

Quasiparticle States around a Nonmagnetic Impurity in a $d$ -Density-Wave State of High- $T_{c}$ Cuprates

Jian-Xin Zhu, Wonkee Kim, C. S. Ting, and J. P. Carbotte

Phys. Rev. Lett. 87, 197001 – Published 16 October 2001

Abstract

The electronic structure around a single nonmagnetic impurity in the $d$ -density-wave (DDW) ordering is studied. It is found that a single subgap resonance peak appears in the local density of states around the impurity. In the unitary limit, the position of this resonance peak shifts away from the Fermi energy in accord with the chemical potential. This result is dramatically different from the case of the pure superconducting state for which the impurity resonant energy is approximately pinned at the Fermi level. This can be used to probe the existence of the DDW ordering in cuprates.

Received 29 May 2001

DOI:https://doi.org/10.1103/PhysRevLett.87.197001

Authors & Affiliations

Jian-Xin Zhu^1,2, Wonkee Kim³, C. S. Ting¹, and J. P. Carbotte³

¹Texas Center for Superconductivity, University of Houston, Houston, Texas 77204
²Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
³Department of Physics & Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1