Publication: Quantum Monte Carlo study of a nonmagnetic impurity in the two-dimensional Hubbard model
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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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American Physical Society (APS)
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Physics
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Physical Review B
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10.1103/PhysRevB.68.235103