Controllable Negative Differential Resistance Behavior of an Azobenzene Molecular Device Induced by Different Molecule-Electrode Distances  

作　　者：FAN Zhi-Qiang ZHANG Zhen-Hua QIU Ming DENG Xiao-Qing TANG Gui-Ping 范志强;张振华;邱明;邓小清;唐贵平(School of Physics and Electronic Science,Changsha University of Science and Technology,Changsha 410004)

机构地区：[1]School of Physics and Electronic Science,Changsha University of Science and Technology,Changsha 410004

出　　处：《Chinese Physics Letters》2012年第7期235-238,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 61071015 and 11147188;the Scientific Research Fund of Hunan Provincial Education Department under Grant No 11C0066;the Construct Program of the Key Discipline in Hunan Province.

摘　　要：We report the ab initio calculations of transport behaviors of an azobenzene molecular device which is similar to the experimental configurations.The calculated results show that the transport behaviors of the device are sensitive to the molecule-electrode distance and the currents will drop rapidly when the molecule-electrode distance changes from 1.7(A) to 2.0(A).More interestingly,the negative differential resistance behavior can be found in our device.Nevertheless,it is not the inherent property of an azobenzene molecular device but an effect of the molecule-electrode distance.Detailed analyses of the molecular projected self-consistent Hamiltonian states and the transmission spectra of the system reveal the physical mechanism of these behaviors.

关 键 词：ELECTRODE behaviors BENZENE 

分 类 号：O62[理学—有机化学]