Zero-energy state in graphene in a high magnetic field

Joseph G. Checkelsky, Lu Li, N. P. Ong

Research output: Contribution to journalArticlepeer-review

228 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number206801
JournalPhysical review letters
Volume100
Issue number20
DOIs
StatePublished - May 20 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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