Tunneling conductance spectrum of metal and metal junction system

บทคัดย่อ

The aim of this research was to study the conductance spectrum of electron transfer in 1, 2 and 3 dimensions for a metal/metal junction using free electron approximation, which is a system that has free electrons moving, so the kinetic energy is affected but not the potential energy. Furthermore, the delta function potential wall was set and the potential strength will only occur at the junction. The results revealed that the conductance of the 1, 2 and 3-dimensions were significantly different from each other. However, it was found that they all had the same character of decreasing conductance with increasing potential strength. The maximum conductance was obtained when the barries was zero. The effect of the electron effective mass was also determined. It was found that electrons of the same effective mass in both of the metals provided the maximum conductance. The results from an off-set energy did not affect the conductance spectrum, but did change the starting point of the conductance spectrum.