TY - JOUR
T1 - Multi-component fractional quantum Hall states in graphene
T2 - SU(4) versus SU(2)
AU - Töke, C.
AU - Jain, J. K.
PY - 2012/6/13
Y1 - 2012/6/13
N2 - Because of the spin and Dirac-valley degrees of freedom, graphene allows the observation of one-, two-or four-component fractional quantum Hall effects in different parameter regions. We address the stability of various states in the SU(2) and SU(4) limits. In the SU(4) limit, we predict that new low-energy Goldstone modes determine the stability of the fractional quantum Hall states at 2/5, 3/7, etc; SU(4) skyrmions are not found to be relevant for the low-energy physics. These results are discussed in light of experiments.
AB - Because of the spin and Dirac-valley degrees of freedom, graphene allows the observation of one-, two-or four-component fractional quantum Hall effects in different parameter regions. We address the stability of various states in the SU(2) and SU(4) limits. In the SU(4) limit, we predict that new low-energy Goldstone modes determine the stability of the fractional quantum Hall states at 2/5, 3/7, etc; SU(4) skyrmions are not found to be relevant for the low-energy physics. These results are discussed in light of experiments.
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U2 - 10.1088/0953-8984/24/23/235601
DO - 10.1088/0953-8984/24/23/235601
M3 - Article
C2 - 22569096
AN - SCOPUS:84861164203
SN - 0953-8984
VL - 24
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 23
M1 - 235601
ER -