Contact effect in the dynamic electron transport of a two-probe mesoscopic conductor |
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Authors: | Quan Jun Xiao Shi-Fa Tian Ying |
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Institution: | School of Physics Science and Technology, Zhanjiang Normal University, Zhanjiang 524048, China |
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Abstract: | Based on the self-consistent electron dynamic transport theory for multi-probe mesoscopic systems, we calculate the distribution of internal potential, charge density, and ac conductance of a two-probe mesoscopic conductor with wide trapezoid reservoirs, and study the contact effect. The results show that including the contact effect can make a significant difference to the frequency-dependent electron transport properties. In the nonzero frequency case, the internal potential and the charge density are complex with extremely small imaginary parts. Importantly, the imaginary part of the charge density gives rise to a real ac conductance (admittance), which corresponds to the charge-relaxation resistance. |
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Keywords: | mesoscopic system electron transport conductance charge density |
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