Method of controlling a super conductor
First Claim
1. A method for modulating a superconducting current in at least one region of a superconductor having paired spin-up and spin-down charge carriers, comprising the step of suppressing the order parameter within said at least one region of said superconductor by injecting spin-polarized charge carriers into said at least one region of said superconductor.
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Accused Products
Abstract
The order parameter of a superconductor is reduced by injecting spin-polarized carriers into the superconductor. The reduction in the order parameter is used to modulate the critical current of the superconductor. In a typical embodiment, a current is caused to flow through a superconductor. Spin polarized electrons are then injected into the path of the current in the superconductor by biasing a magnetic metal with respect to a terminal of the superconductor. The bias current may be varied to modulate the injection and thus the flow of current through the superconductor.
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Citations
24 Claims
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1. A method for modulating a superconducting current in at least one region of a superconductor having paired spin-up and spin-down charge carriers, comprising the step of suppressing the order parameter within said at least one region of said superconductor by injecting spin-polarized charge carriers into said at least one region of said superconductor.
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2. A method of suppressing the superconductivity of a superconducting material, comprising the steps of:
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driving, from a first terminal of said superconducting material to a second terminal of said superconducting material, a superconducting current along a layer of superconducting material, said layer of superconducting material being in electrical contact with a layer of spin injection material capable of producing a spin-polarized current of spin-polarized carriers; electrically biasing said spin injection material with respect to said superconducting material so that a spin-polarized current of said spin-polarized carriers from said spin-injection material is injected into said superconducting layer between said first and second terminals, whereby said injected spin-polarized carriers reduce the order parameter of said superconducting layer between said first and second terminals. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Circuitry for suppressing the superconductivity of a superconducting material, comprising:
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a layer of a superconducting material having a first terminal and a second terminal opposite said first terminal a first biasing circuit electrically biasing said first terminal with respect to said second terminal so as to drive a superconducting current along said layer of said superconducting material; a layer of a spin injection material, capable of producing a spin-polarized current of spin-polarized carriers, in electrical contact with said superconducting material; and a second biasing circuit electrically biasing said layer of spin injection material with respect to said superconducting material so that a spin-polarized current of said spin-polarized carriers from said spin-injection material is injected into a portion of said superconducting layer between said first and second terminals. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification