Abstract
We explore quantum effects of capacitance in nano-scale systems, by using a first-principles calculation of a carbon nanotube (CNT) capacitor. We show that the capacitance exhibits two principal quantum effects: First, the capacitance shows a large bias dependence, reflecting the density of states structure of the CNT with the divergent-type Van-Hove singularities peculiar to quasi-one dimensional systems. Second, the capacitance is larger than what the classical electromagnetism predicts with the tube-wall radius, according to a quantum spill of the stored charge density from the tube wall. We argue that these two quantum effects in the capacitance become more prominent when the system size gets smaller, which will open a new possibility for a design and control of nanometer scale devices.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.