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Metal to insulator transition on the N=0 Landau level in graphene.
- Source :
-
Physical review letters [Phys Rev Lett] 2010 Jul 23; Vol. 105 (4), pp. 046804. Date of Electronic Publication: 2010 Jul 22. - Publication Year :
- 2010
-
Abstract
- The magnetotransport in single layer graphene has been experimentally investigated in magnetic fields up to 18 T as a function of temperature. A pronounced T dependence is observed for T≲50 K, which is either metallic, or insulating, depending on the filling factor ν. The metal-insulator transition (MIT) occurs at |ν{c}|∼0.65 and in the regime of the dissipative transport, where the longitudinal resistance Rxx>1/2R{K}. The critical resistivity (Rxx per square) is ρ{xx}(ν{c})≈1/2R{K} and is correlated with the appearance of zero plateau in Hall conductivity σ{xy}(ν) and peaks in σ{xx}(ν). This leads us to construct a universal low-T (n, B) phase diagram of this quantum phase transition.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 105
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 20867875
- Full Text :
- https://doi.org/10.1103/PhysRevLett.105.046804