TY - JOUR
T1 - Zero-energy state in graphene in a high magnetic field
AU - Checkelsky, Joseph G.
AU - Li, Lu
AU - Ong, N. P.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2008/5/20
Y1 - 2008/5/20
N2 - The fate of the charge-neutral Dirac point in graphene in a high magnetic field H has been investigated at low temperatures (T∼0.3K). In samples with small gate-voltage offset V0, the resistance R0 at the Dirac point diverges steeply with H, signaling a crossover to a state with a very large R0. The approach to this state is highly unusual. Despite the steep divergence in R0, the profile of R0 vs T in fixed H saturates to a T-independent value below 2 K, consistent with gapless charge-carrying excitations.
AB - The fate of the charge-neutral Dirac point in graphene in a high magnetic field H has been investigated at low temperatures (T∼0.3K). In samples with small gate-voltage offset V0, the resistance R0 at the Dirac point diverges steeply with H, signaling a crossover to a state with a very large R0. The approach to this state is highly unusual. Despite the steep divergence in R0, the profile of R0 vs T in fixed H saturates to a T-independent value below 2 K, consistent with gapless charge-carrying excitations.
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U2 - 10.1103/PhysRevLett.100.206801
DO - 10.1103/PhysRevLett.100.206801
M3 - Article
C2 - 18518564
AN - SCOPUS:44149105167
SN - 0031-9007
VL - 100
JO - Physical review letters
JF - Physical review letters
IS - 20
M1 - 206801
ER -