Spin transistors based on voltage-controlled magnon transport in multiferroic antiferromagnets
AssigneeWisconsin Alumni Research Foundation
InventorsChang-Beom EOM, Tianxiang NAN, Jonathon SCHAD
Life of this patent
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Abstract
Voltage-controlled spin field effect transistors (“spin transistors”) and methods for their use in switching applications are provided. In the spin transistors, spin current is transported from a spin injection contact to a spin detection contact through a multiferroic antiferromagnetic channel via magnon propagation. The spin current transport is modulated by the application of a gate voltage that increases the number of domain boundaries the multiferroic antiferromagnetic material.
Claims20
A voltage-controlled spin transistor comprising:
- a spin injector contact;
- a spin detector contact;
- a layer of a multiferroic material that forms a channel between the spin injector contact and the spin detector contact;
- at least one top gate contact;
- and
- at least one bottom gate contact,
- wherein the at least one top gate contact and the at least one bottom gate contact are configured to apply a gate voltage across the channel.
A method of operating the spin transistor comprising:
- a spin injector contact;
- a spin detector contact;
- a layer of a multiferroic material that forms a channel between the spin injector contact and the spin detector contact;
- at least one top gate contact;
- and
- at least one bottom gate contact,
- wherein the at least one top gate contact and the at least one bottom gate contact are configured to apply a gate voltage across the channel, the method comprising:
- creating a spin current in the spin injector contact, whereby the spin current is injected into the channel and transported through the channel to the spin detector contact via magnon propagation;
- and
- applying a gate voltage across the channel, wherein the application of the gate voltages increases the density of domain boundaries in the channel and attenuates spin current transport through the channel.
Dependencies are inferred from the claim text.