Conductance and Wave Impedance of Electrons
In circuit theory, impedance is used to characterize input/output. For waves, in addition to impedance with lump entities, an additional parameter, the wave impedance or characteristic impedance of the transmission medium which involves the propagation constant, needs to be considered. Electromagnetic waves are considered as `true waves because the energymomentum relation is linear allowing a wave packet to maintain at all time, and in any frame of reference. However, for electrons, a Gaussian packet spreads because of the non-linear E-k dispersion, as well as the fact that k, the de Broglie wave vector, depends on the frame of reference. In spite of these concerns that electron, perhaps, is not really a wave, we present the concept of wave impedance of electrons. Within a finite mean free path, the propagation of an electron in a quantum wire of quantum waveguide in general can be characterized by the wave impedance.
Raphael Tsu Timir Datta
University of North Carolina at Charlotte,Charlotte,NC 28223,USA University of South Carolina,Columbia,SC 29208,USA
国际会议
Progress in Electromagnetics Research Symposium 2008(2008年电磁学研究新进展学术研讨会)(PIERS 2008)
杭州
英文
1-6
2008-03-24（万方平台首次上网日期，不代表论文的发表时间）