Two Dimensional Electron and Hole Gases at the Surface of Graphite

Abstract

We report high-quality two-dimensional (2D) electron and hole gases induced at the surface of graphite by the electric field effect. The 2D carriers reside within a few near-surface atomic layers and exhibit mobilities up to 15,000 and 60,000 cm2/Vs at room and liquid-helium temperatures, respectively. The mobilities imply ballistic transport at micron scale. Pronounced Shubnikov-de Haas oscillations reveal the existence of two types of carries in both 2D electron and hole gases.

arXiv commentrelated to cond-mat/0410631 where preliminary data for this experimental system were reported

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• Electric Field Modulation of Galvanomagnetic Properties of Mesoscopic Graphite
• Phase analysis of quantum oscillations in graphite
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