Excitons in hexagonal nanonetwork materials
Excitons in hexagonal nanonetwork materials
复制标题
六方纳米网络材料中的激子
DOI：
10.1016/s0379-6779(02)00832-9
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发表时间：
2003
期刊：
影响因子：
4.4
通讯作者：
K. Harigaya
中科院分区：
文献类型：
--
作者：
K. Harigaya
Optical excitations in hexagonal nanonetwork materials, for example, Boron-Nitride (BN) sheets and nanotubes, are investigated theoretically. A permanent electric dipole moment, whose direction is from the B site to the N site, is considered along the BN bond. When the exciton hopping integral is restricted to the nearest neighbors, the flat band of the exciton appears at the lowest energy. The symmetry of this exciton band is optically forbidden, indicating that the excitons relaxed to this band will show quite long lifetime which will cause luminescence properties.
