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APS » Journals » Phys. Rev. Lett. » Volume 102 » Issue 16
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Phys. Rev. Lett. 102, 167201 (2009) [4 pages]

Impurity-Induced Frustration in Correlated Oxides

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Cheng-Wei Liu1, Shiu Liu2, Ying-Jer Kao1,*, A. L. Chernyshev2, and Anders W. Sandvik3,1
1Department of Physics, National Taiwan University, Taipei, Taiwan 106
2Department of Physics and Astronomy, University of California, Irvine, California 92697, USA
3Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, USA

Received 4 December 2008; revised 24 February 2009; published 21 April 2009

Using the example of Zn-doped La2CuO4, we demonstrate that a spinless impurity doped into a nonfrustrated antiferromagnet can induce substantial frustrating interactions among the spins surrounding it. This result is the key to resolving discrepancies between experimental data and earlier theories. Analytic and quantum Monte Carlo studies of the impurity-induced frustration are in a close accord with each other and experiments. The proposed mechanism should be common to other correlated oxides.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.167201
DOI:
10.1103/PhysRevLett.102.167201
PACS:
75.10.Jm, 75.30.Ds, 78.70.Nx

*yjkao@phys.ntu.edu.tw

 
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