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Quantum Monte Carlo study of a nonmagnetic impurity in the two-dimensional Hubbard model

N. Bulut
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Abstract

In order to investigate the effects of nonmagnetic impurities in strongly correlated systems, Quantum Monte Carlo (QMC) simulations have been carried out for the doped two-dimensional Hubbard model with one nonmagnetic impurity. Using a bare impurity potential which is onsite and attractive, magnetic and single-particle properties have been calculated. The QMC results show that giant oscillations develop in the Knight shift response around the impurity site due to the short-range antiferromagnetic correlations. These results are useful for interpreting the NMR data on Li and Zn substituted layered cuprates.

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N. Bulut. 2003-08-05. Quantum Monte Carlo study of a nonmagnetic impurity in the two-dimensional Hubbard model. https://doi.org/10.1103/physrevb.68.235103

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