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尤文龙与王雪峰教授等合作在APL上发表研究论文

日期: 2016-06-24     阅读次数:855

标题:Electronic propertiesin a quantum well structure of Weyl semimetal

作者:Wen-LongYou, Xue-Feng Wang, Andrzej M. Ole? and Jiao-Jiao Zhou

论文摘要:
Weinvestigate the confined states and transport of three-dimensional Weylelectrons around a one-dimensional external rectangular electrostaticpotential. The confined states with finite transverse wave vector exist atenergies higher than the half well depth or lower than the half barrier height.The rectangular potential appears completely transparent to the normal incidentelectrons but not otherwise. The tunneling transmission coefficient issensitive to their incident angle and shows resonant peaks when their energycoincides with the confined spectra. In addition, for the electrons in theconduction (valence) band through a potential barrier (well), the transmissionspectrum has a gap of width increasing with the incident angle. Interestingly,the electron linear zero-temperature conductance over the potential canapproach zero when the Fermi energy is aligned to the top and bottom energiesof the potential, when only electron beams normal to the potential interfacescan pass through. The considered structure can be used to collimate the Weylelectron beams.
 
原文链接:http://scitation.aip.org/content/aip/journal/apl/108/16/10.1063/1.4947434 




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