Document Detail


Broken-symmetry states of Dirac fermions in graphene with a partially filled high Landau level.
MedLine Citation:
PMID:  18517810     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
We report on numerical study of the Dirac fermions in partially filled N=3 Landau level (LL) in graphene. At half-filling, the equal-time density-density correlation function displays sharp peaks at nonzero wave vectors +/-q*. Finite-size scaling shows that the peak value grows with electron number and diverges in the thermodynamic limit, which suggests an instability toward a charge density wave. A symmetry broken stripe phase is formed at large system size limit, which is robust against perturbation from disorder scattering. Such a quantum phase is experimentally observable through transport measurements. Associated with the special wave functions of the Dirac LL, both stripe and bubble phases become possible candidates for the ground state of the Dirac fermions in graphene with lower filling factors in the N=3 LL.
Authors:
Hao Wang; D N Sheng; L Sheng; F D M Haldane
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2008-03-20
Journal Detail:
Title:  Physical review letters     Volume:  100     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2008 Mar 
Date Detail:
Created Date:  2008-06-03     Completed Date:  2008-06-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  116802     Citation Subset:  -    
Affiliation:
Department of Physics and Astronomy, California State University, Northridge, CA 91330, USA.
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