Ab Initio Calculation of Capacitance of Semi-Infinite Jellium Electrodes with a Nanoscale Gap
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概要
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We have examined the capacitance of two parallel jellium electrodes with a nanoscale gap using an <I>ab initio</I> method within the density functional theory. As the gap becomes smaller, first the calculated capacitance exhibits behavior qualitatively similar to that estimated using classical electrostatics, but is systematically larger than the classical one. Then, the calculated capacitance decreases when the gap approaches zero. The value of the maximum capacitance is larger for a smaller Wigner-Seitz radius of the electrodes. These results can be understood from two quantum effects, namely, electron spill from the electrodes and tunneling between the electrodes.
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公益社団法人 応用物理学会 | 論文
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