Magnetic impurities in graphene

F. M. Hu, Tianxing Ma, Hai-Qing Lin, and J. E. Gubernatis
Phys. Rev. B 84, 075414 – Published 3 August 2011

Abstract

We used a quantum Monte Carlo method to study the magnetic impurity adatoms on graphene. We found that by tuning the chemical potential we could switch the values of the impurity local magnet moment between relatively large and small values. Our computations of the impurity spectral density found its behavior to differ significantly from that of an impurity in a normal metal and our computations of the charge-charge and spin-spin correlations between the impurity and the conduction-band electrons found them to be strongly suppressed. In general, our results are consistent with those from poor man’s scaling and numerical renormalization group methods.

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  • Received 27 June 2011

DOI:https://doi.org/10.1103/PhysRevB.84.075414

©2011 American Physical Society

Authors & Affiliations

F. M. Hu1,2, Tianxing Ma3, Hai-Qing Lin4,1, and J. E. Gubernatis5

  • 1Department of Physics and Institute of Theoretical Physics, The Chinese University of Hong Kong, Hong Kong, China
  • 2COMP/Department of Applied Physics, Aalto University School of Science and Technology, P.O. Box 11000, FI-00076 Aalto, Espoo, Finland
  • 3Department of Physics, Beijing Normal University, Beijing 100875, China
  • 4Beijing Computational Science Research Center, Beijing 100084, China
  • 5Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

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Issue

Vol. 84, Iss. 7 — 15 August 2011

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