Topic
Quantum capacitance
About: Quantum capacitance is a research topic. Over the lifetime, 954 publications have been published within this topic receiving 24165 citations.
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TL;DR: In this paper, a comprehensive approach to calculate quantum capacitance of nanoscale capacitors as a function of applied potential difference to have resemblance to actual device operating conditions was introduced for different elementary materials and geometries for the soundness of the approach.
1 citations
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TL;DR: In this paper , the effect of co-doping and line doping on the quantum capacitance of stanene-based supercapacitors was investigated using density functional theory.
Abstract: The effect of co-doping and line-doping of N/P/S and heavy metals (TMs, Ti, V, Fe, Ni) in stanene on the geometric structure, electronic behaviors, and quantum capacitance was systematically studied using density functional theory (DFT). The calculated results suggested that the line-doping enlarged the quantum capacitance (CQ) of stanene more effectively than that of co-doping. The electron density of states indicated the increase of CQ was attributed to the hybridization of TM-dopant and sn-atoms around the Fermi level. However, the performance of quantum capacitance of doped-stanene was at a disadvantage to that of doped-graphene. We hope our results give further insights into the improvement of CQ of stanene-based supercapacitors.
1 citations
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TL;DR: In this paper, the quantum capacitance that directly characterizes the density of states of highly mobile Dirac two-dimensional states formed on the surface of a stressed HgTe film is studied experimentally.
Abstract: The quantum capacitance that directly characterizes the density of states of highly mobile Dirac two-dimensional states formed on the surface of a stressed HgTe film is studied experimentally It is shown that, as opposed to the oscillations in the magnetotransport to which all the existing types of carriers contribute, the quantum oscillations observed in the magnetic capacitance correspond to electrons on the upper surface of the film Thus, capacitance spectroscopy is a selective technique for studying the properties of an individual topological surface, even when a large number of bulk carriers are present Because of this feature, for the first time we have obtained data on the phase shift in the Shubnikov-de Haas oscillations usually associated with the Berry phase for an isolated Dirac cone and found its dependence on the location of the Fermi level
1 citations
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03 Sep 2008TL;DR: In this paper, a new capacitor structure using carbon nanotube electrodes was proposed, which is suitable for use in advanced integrated circuit technologies and exhibits a capacitance per unit area of 175 fF/mum2.
Abstract: We propose a new capacitor structure which uses carbon nanotube electrodes and is suitable for use in advanced integrated circuit technologies. Metallic carbon nanotubes have characteristics which make them well suited for capacitor electrodes (low resistance and large surface area per unit volume). We demonstrate that our thin vertical plate carbon nanotube capacitor can exhibit a capacitance per unit area of 175 fF/mum2.
1 citations
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TL;DR: In this article , two-dimensional solid electrolytes of ScI3 and YBr3 as buffer layers have been proposed to modulate the carrier density and improve the quantum capacitance of graphene.
1 citations