Many-body calculation of the spatial extent of the wave function of a nonmagnetic impurity in a d-wave high-temperature superconductor using the tJ model

Manuela Capello and Didier Poilblanc
Phys. Rev. B 79, 224507 – Published 8 June 2009

Abstract

Scanning tunneling microscopy (STM) by providing images of the effects of individual zinc impurities in cuprate superconductors with unprecedented atomic resolution offers a stringent test to models of correlated fermions for high-temperature superconductors. Using a tJ model supplemented by variational Monte Carlo many-body techniques, the spatial dependence of the hole density and of the valence bond and superconducting pairing amplitudes around the impurity are computed. Our calculation supplemented by the theory of interlayer tunneling by I. Martin et al. [Phys. Rev. Lett. 88, 097003 (2002)] can explain most features of the STM experiments including the cross-shaped spatial structure and the impurity “resonant” peak.

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  • Received 12 March 2009

DOI:https://doi.org/10.1103/PhysRevB.79.224507

©2009 American Physical Society

Authors & Affiliations

Manuela Capello1 and Didier Poilblanc2,1

  • 1Laboratoire de Physique Théorique, CNRS and Université de Toulouse, F-31062 Toulouse, France
  • 2Institute of Theoretical Physics, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland

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Issue

Vol. 79, Iss. 22 — 1 June 2009

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