Field-Induced Free-Electron Carriers in Graphite
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概要
- 論文の詳細を見る
First-principles calculations show that free-electron carriers are induced in a few-layer graphite by applying an external electric field normal to the graphene plane. The electric field substantially shifts the nearly free electron (NFE) states downward, and the states are not distributed at atomic sites but in spacious regions in graphite. The NFE state finally crosses the Fermi level under an electric field of about 0.5 V/Å. It is found that the threshold voltage resulting in free-electron carriers monotonically decreases with increasing number of layers. This indicates the possibility of field-induced superconductivity in all carbon materials even without chemical doping.
- Physical Society of Japanの論文
- 2010-07-15
著者
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Okada Susumu
Graduate School of Pure and Applied Sciences and Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
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Otani Minoru
Nanosystem Research Institute (NRI), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
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