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US 2002/0121669 A1Published application
Organic superconductive field-effect switching device
OwnerBertham Josef Batlogg, Christian Kloc +1inventors
InventorsBertham Josef Batlogg, Christian Kloc, Jan Hendrik Schon
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Abstract
Disclosed is a field-effect switch that uses an applied field to induce superconductivity in a normally insulative switch element. The switch element comprises an intercalated crystal of C60 together with a further species such as a methylene trihalide. Using such a switch element, we have obtained field-induced superconducting transitions at temperatures well above 77K.
Claims14
A device, comprising:
- a) a substrate;
- and
- b) an FET electrode arrangement formed on the substrate, said arrangement comprising source, drain, and gate electrodes and a further layer, situated between the substrate and the gate electrode, that is more insulative than the substrate,
- and wherein:
- c) the substrate comprises material having a crystal structure in which C60 is intercalated with at least one further molecular species such that at least one lattice constant of the crystal structure is greater than the corresponding lattice constant of pure C60;
- and
- d) said material has no superconducting transition in the absence of applied electric fields, but said material is capable of becoming superconducting in a portion of the substrate at temperatures below a critical temperature when the FET electrode arrangement is operated so as to inject at least a minimum density of carriers into the substrate.
4 more elements
A method, comprising:
- at a temperature less than or equal to a critical temperature, operating an FET electrode arrangement formed on a substrate comprising a material having a crystal structure in which C60 is intercalated with at least one further molecular species such that at least one lattice constant of the crystal structure is greater than the corresponding lattice constant of pure C60, thereby to induce superconductivity in at least a portion of the substrate material.
Dependencies are inferred from the claim text.