Low-energy electronic states of carbon nanocones in an electric field

作     者：Jun-Liang Chen Ming-Horng Su Chi-Chuan Hwang Jian-Ming Lu Chia-Chang Tsai 

作者机构：Department of Mechanical Engineering Wu Feng Institute of Technology Department of Fire Science Wu Feng Institute of Technology Department of Engineering Science National Cheng Kung University Advanced Networking Business Unit National Center for High-Performance Computing National Applied Research Laboratories Institute of Atomic and Molecular Sciences Academia Sinica 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2010年第2卷第2期

页      面：121-125页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 070301[理学-无机化学] 0702[理学-物理学] 

基　　金：supported in part by the National Science Council of Taiwan under Grant Nos.NSC 96-2221-E-492-007-MY3 and NSC 98-2221-E-006-131-MY3 National Center for Theoretical Science(NCTS)in Taiwan 

主　　题：Low-energy electronic states Carbon Nanocones Electric field 

摘      要：The low-energy electronic states and energy gaps of carbon nanocones in an electric field are studied using a single-?-band tight-binding model. The analysis considers five perfect carbon nanocones with disclination angles of 60°, 120°, 180°, 240° and 300°, respectively. The numerical results reveal that the low-energy electronic states and energy gaps of a carbon nanocones are highly sensitive to its geometric shape(i.e. the disclination angle and height), and to the direction and magnitude of an electric field. The electric field causes a strong modulation of the state energies and energy gaps of the nanocones, changes their Fermi levels, and induces zero-gap transitions. The energy-gap modulation effect becomes particularly pronounced at higher strength of the applied electric field, and is strongly related to the geometric structure of the nanocone.