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Frequency-dependent Admittance of a Three-probe Mesoscopic Conductor
J. Chuen,Ying Tian 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.6
By considering of two factors, the hopping of electrons between different channels in the scattering on the interfaces of different regions the contact effect, we investigate in a self-consistent manner the frequency-dependent admittance of a three-probe mesoscopic conductor connected with wide reservoirs. Results indicate that the frequency-dependent admittance shows two different responses to an external ac voltage, namely, inductive-like and capacitive-like, which depend on the sign of the matrix elements of the admittance. Importantly, the contact effect can cause a significant difference in the frequency-dependent electrons transport properties, especially in high-frequency cases.