Critical optical properties of AB-stacked graphenes

• Main Authors: Chun-YiHuang, 黃俊嶧
• Other Authors: Ming-Fa Lin
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/00415640040149908808

碩士 === 國立成功大學 === 物理學系 === 102 === The band structures and optical properties of AB-stacked multilayer graphenes (MLG) are calculated by the tight-binding model and gradient approximation. For a n_L-layer AB-stacked graphenes, there are about n_L^2 of the excitation channels at both low and middle frequencies. However, in the excitation spectra, n_L (n_L-1) peaks exist at low frequencies for even-layer (odd-layer) systems, and one shoulder and n_L peaks at middle frequency. With increasing n_L, those structures are confined to certain boundaries, and the differences in the electonic structures and optical properties between the odd and even layers are reduced. When n_L grows to 30 (30), the spectra of 2D AB-stacked graphene are almost identical to those of 3D AB-stacked graphite at middle (low) frequencies.