Room-Temperature Quantum Hall Effect in Graphene

Abstract

The quantum Hall effect (QHE), one example of a quantum phenomenon that occur on a truly macroscopic scale, has been attracting intense interest since its discovery in 1980 and has helped elucidate many important aspects of quantum physics. It has also led to the establishment of a new metrological standard, the resistance quantum. Disappointingly, however, the QHE could only have been observed at liquid-helium temperatures. Here, we show that in graphene - a single atomic layer of carbon - the QHE can reliably be measured even at room temperature, which is not only surprising and inspirational but also promises QHE resistance standards becoming available to a broader community, outside a few national institutions.

Published in Science online 15 February 2007

References in corpus (2)

• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene

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• Photoluminescence quenching in gold - MoS2 hybrid nanoflakes
• High yield production of ultrathin fibroid semiconducting nanowire of Ta${}_2$Pd${}_3$Se${}_8$
• Na-intercalation compounds and Na-ion batteries
• Multifield phonon spectrometrics of structured liquid and solid crystals
• Study of simulated Bloch oscillations in strained graphene using neural networks
• Material realization of spinless, covalent-type Dirac semimetals in three dimensions
• Raman spectroscopy and imaging of graphene
• Edge density of bulk states due to relativity
• Husimi Maps in Graphene
• Control of Plasmons in Doped Topological Insulators via Basis Atoms
• Nonlinear Optical Conductivity in Graphene and other 2-Band 2-D Materials
• First Principle Study of Alkaline Metal Intercalation in Twisted Bilayer Graphene