TY - JOUR
T1 - Metal to insulator transition on the N=0 landau level in graphene
AU - Zhang, Liyuan
AU - Zhang, Yan
AU - Khodas, M.
AU - Valla, T.
AU - Zaliznyak, I. A.
PY - 2010/7/22
Y1 - 2010/7/22
N2 - 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 50K, which is either metallic, or insulating, depending on the filling factor ν. The metal-insulator transition (MIT) occurs at |νc|∼0.65 and in the regime of the dissipative transport, where the longitudinal resistance Rxx>12RK. The critical resistivity (Rxx per square) is ρxx(νc) 12RK and is correlated with the appearance of zero plateau in Hall conductivity σxy(ν) and peaks in σxx(ν). This leads us to construct a universal low-T (n, B) phase diagram of this quantum phase transition.
AB - 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 50K, which is either metallic, or insulating, depending on the filling factor ν. The metal-insulator transition (MIT) occurs at |νc|∼0.65 and in the regime of the dissipative transport, where the longitudinal resistance Rxx>12RK. The critical resistivity (Rxx per square) is ρxx(νc) 12RK and is correlated with the appearance of zero plateau in Hall conductivity σxy(ν) and peaks in σxx(ν). This leads us to construct a universal low-T (n, B) phase diagram of this quantum phase transition.
UR - http://www.scopus.com/inward/record.url?scp=77954898641&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.105.046804
DO - 10.1103/PhysRevLett.105.046804
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AN - SCOPUS:77954898641
SN - 0031-9007
VL - 105
JO - Physical Review Letters
JF - Physical Review Letters
IS - 4
M1 - 046804
ER -