Tunable Magnetic Properties of Rhombohedral Graphite Thin Films: Effects of Insulating Substrate on Magnetic Properties
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概要
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First-principles total energy calculations are performed to investigate the electronic and magnetic properties of rhombohedral graphite thin films on hexagonal boron nitride (h-BN) substrate. We find that the ferrimagnetic spin ordering of graphite thin films on h-BN substrate is robust irrespective of the adsorption arrangement. However, by enhancing the interaction between the graphite thin film and the substrate, the interaction suppresses the electron spin polarization of the bottommost graphene layer situated at the interface with the substrate. The electron spin polarization emerges at the second subsurface graphene layer in the thin film. We also find that the magnetic property of the graphite thin film on the insulating substrate is tunable by applying an external pressure.
- 2012-02-25
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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Cuong Nguyen
Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, 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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Otani Minoru
Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
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