Tikhonov, K. S. and Feigel’man, M. V. and Kitaev, A. Yu. (2011) Power-Law Spin Correlations in a Perturbed Spin Model on a Honeycomb Lattice. Physical Review Letters, 106 (6). Art. No. 067203. ISSN 0031-9007 http://resolver.caltech.edu/CaltechAUTHORS:20110316-161521086
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Abstract
We consider the spin- 12 model on the honeycomb lattice in the presence of a weak magnetic field h_α ≪ 1. Such a perturbation destroys the exact integrability of the model in terms of gapless fermions and static Z_2 fluxes. We show that it results in the appearance of a long-range tail in the irreducible dynamic spin correlation function: ≪s^z(t,r)s^z(0,0)≫ α h^2_z f(tr), where f(t,r) α [max(t,r]^(-4) is proportional to the density polarization function of fermions.
| Item Type: | Article | ||||
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| Additional Information: | © 2011 American Physical Society. Received 12 September 2010; revised 3 January 2011; published 11 February 2011. We are grateful to L. B. Ioffe and A. S. Ioselevich for useful discussions. This research was supported by the RFBR Grant No. 10-02-00554. | ||||
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| Classification Code: | PACS: 75.10.Jm | ||||
| Record Number: | CaltechAUTHORS:20110316-161521086 | ||||
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:20110316-161521086 | ||||
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| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||
| ID Code: | 22949 | ||||
| Collection: | CaltechAUTHORS | ||||
| Deposited By: | Benjamin Perez | ||||
| Deposited On: | 16 Mar 2011 23:38 | ||||
| Last Modified: | 26 Dec 2012 13:04 |
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