Kwapiński T
Institute of Physics and Nanotechnology Center, M Curie-Skłodowska University, 20-031 Lublin, Poland.
J Phys Condens Matter. 2005 Sep 21;17(37):5849-5858. doi: 10.1088/0953-8984/17/37/020.
The electron transport through a monatomic metallic wire connected to leads is investigated using the tight-binding Hamiltonian and the Green function technique. Analytical formulae for the transmittance are derived and M-atom oscillations of the conductance versus the length of the wire are found. Maxima of the transmittance function versus the energy, for a wire consisting of N atoms, determine the (N+1) period of the conductance. The periods of conductance oscillations are discussed and the local and average quantum wire charges are presented. The average charge of the wire is linked with the period of the conductance oscillations and for M-atom periodicity there are possible (M-1) average occupations of the wire states.
利用紧束缚哈密顿量和格林函数技术，研究了连接到引线的单原子金属线中的电子输运。推导了透射率的解析公式，并发现了电导随线长的M原子振荡。对于由N个原子组成的线，透射率函数相对于能量的最大值决定了电导的(N + 1)周期。讨论了电导振荡的周期，并给出了局部和平均线电荷。线的平均电荷与电导振荡的周期相关，对于M原子周期性，线态可能有(M - 1)个平均占据情况。
