报告题目：The electronic transport efficiency of a graphene charge carrier guider
and an Aharanov–Bohm interferometer
报告人：成淑光 西北大学
报告时间：2019年 5月 21 日 晚 7:00-8:00
邀请人： 江华
报告地点：致远楼 304室
报告摘要：The electrostatic gating defined channel in graphene forms a charge carrier guider. We theoretically investigated electronic transport properties of a single channel and an Aharanov–Bohm (AB) interferometer, based on a charge carrier guider in a graphene nanoribbon. Quantized conductance is found in a single channel, and the guider shows high efficiency in the optical fiber regime, in good agreement with the experiment results. For an AB interferometer without a magnetic field, quantized conductance occurs when there are a few modes inside the channel. The local density of states (LDOS) inside the AB interferometer shows quantum scars when the scattering is strong. At low magnetic field, a periodical conductance oscillation appears. The conductance has a maximum value at zero magnetic field in the absence of intravalley scattering. The mechanism was investigated by LDOS calculations and a toy model.
报告人简介：成淑光，2004年于山西大学物理系获得学士学位。2009年于中国科学院物理研究所获得博士学位。2009年至今在西北大学物理学院工作。感兴趣的方向是各类自由度电子输运的研究。
