2004年2月
Theoretical study on novel electronic properties in nanographite materials
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
- 巻
- 65
- 号
- 2-3
- 開始ページ
- 123
- 終了ページ
- 126
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1016/j.jpcs.2003.10.005
- 出版者・発行元
- PERGAMON-ELSEVIER SCIENCE LTD
Antiferromagnetism in stacked nanographite is investigated with using the Hubbard-type model. We find that the open shell electronic structure can be an origin of the decreasing magnetic moment with the decrease of the inter-layer distance, as experiments on adsorption of molecules suggest. Next, possible charge-separated states are considered using the extended Hubbard model with nearest-neighbor repulsive interactions. The charge-polarized state could appear, when a static electric field is present in the graphene plane for example. Finally, superperiodic patterns with a long distance in a nanographene sheet observed by STM are discussed in terms of the interference of electronic wave functions with a static linear potential theoretically. In the analysis by the k(.)p model, the oscillation period decreases spatially in agreement with experiments. (C) 2003 Elsevier Ltd. All rights reserved.
- リンク情報
- ID情報
-
- DOI : 10.1016/j.jpcs.2003.10.005
- ISSN : 0022-3697
- Web of Science ID : WOS:000188884900005