A calculable quantum capacitance

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/981

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DC Field	Value	Language
dc.contributor.author	Kumar, N.	-
dc.date.accessioned	2005-12-29T09:26:40Z	-
dc.date.available	2005-12-29T09:26:40Z	-
dc.date.issued	1995-05-10	-
dc.identifier.citation	Current Science, 1995, Vol. 68, p945-946.	en
dc.identifier.issn	0011-3891	-
dc.identifier.uri	http://hdl.handle.net/2289/981	-
dc.description.abstract	The idea of a quantum capacitance is introduced explicitly via the generally valid operational definition based on the quadratic charging energy. The direct quantum capacitance CQ per unit area for a strictly two dimensional metallic bilayer is shown to be l/πα, where α, = the Bohr radius. This calculable quantum capacitance acts in series with the usual classical capacitance Ccl = E /4πd, and is independent of the bilayer spacing d, i.e. it has a universal value. Thus, in most cases CQ >>Ccl and is, therefore, ineffective. However, for the ultrathin bi/multilayers now grown routinely epitaxially, as also for the bi/multilayers inherent to the layered high-T, superconductors, we can have CQ ≤ Ccl making CQ dominant. Some possible observable effects are pointed out.	en
dc.format.extent	115610 bytes	-
dc.format.mimetype	application/pdf	-
dc.language.iso	en	en
dc.publisher	Indian Academy of Sciences, Bangalore, India.	en
dc.rights	Indian Academy of Sciences, Bangalore, India.	en
dc.title	A calculable quantum capacitance	en
dc.type	Article	en
Appears in Collections:	Research Papers (LAMP) Research Papers (TP)

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