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Journal of Nanomaterials
Volume 2015, Article ID 842937, 6 pages
Research Article

Self-Consistent Calculation on the Time-Dependent Electrons Transport Properties of a Quantum Wire

School of Physics Science and Technology, Lingnan Normal University, Zhanjiang 524048, China

Received 27 March 2015; Revised 29 June 2015; Accepted 30 June 2015

Academic Editor: Ottorino Ori

Copyright © 2015 J. Chuen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Responses of a quantum wire (QW) connected with wide reservoirs to time-dependent external voltages are investigated in self-consistent manner. Distributions of the internal potential and the induced charge density, capacitance, and conductance are calculated. Results indicate that these physical quantities depend strongly on the Fermi energy of systems and the frequency of external voltages. With the increase of the Fermi energy, capacitance and conductance show some resonant peaks due to the open of the next higher quantum channels and the oscillations related to the longitudinal resonant electron states. Frequency-dependent conductance shows two different responses to the external voltages, inductive-like and capacitive-like; and the peaks structure of capacitance is related to the plasmon-like excitation in mesoscopic conductor.