Metal to Insulator Transition on the N = 0 Landau Level in Graphene
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 {approx}< 50 K, which is either metallic, or insulating, depending on the filling factor {nu}. The metal-insulator transition (MIT) occurs at |{nu}{sub c}| {approx}0.65 and in the regime of the dissipative transport, where the longitudinal resistance R{sub xx} >1/2R{sub K}. The critical resistivity (R{sub xx} per square) is {rho}{sub xx}({nu}{sub c}) {approx} 1/2R{sub K} and is correlated with the appearance of zero plateau in Hall conductivity {sigma}{sub xy}({nu}) and peaks in {sigma}{sub xx}({nu}). This leads us to construct a universal low-T (n, B) phase diagram of this quantum phase transition.
- Research Organization:
- BROOKHAVEN NATIONAL LABORATORY (BNL)
- Sponsoring Organization:
- Doe - Office Of Science
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 989748
- Report Number(s):
- BNL--94021-2010-JA; KC0202020
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 105; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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