Non-linear spin-orbit interaction devices and methods for current-to-spin conversion and amplification of spin-polarizations

A spin-polarized and nonlinear technology, applied in the field of embodiments of spin-amplification systems, can solve problems such as the lack of basic functions of spin-orbit coupling systems

Active Publication Date: 2018-08-21
IBM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although devices based on ferromagnetic materials are well established in today's technological field, spin-orbit coupled systems still lack some fundamental functions

Method used

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  • Non-linear spin-orbit interaction devices and methods for current-to-spin conversion and amplification of spin-polarizations
  • Non-linear spin-orbit interaction devices and methods for current-to-spin conversion and amplification of spin-polarizations
  • Non-linear spin-orbit interaction devices and methods for current-to-spin conversion and amplification of spin-polarizations

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Embodiment Construction

[0023] The structure of the following description is as follows: First, general embodiments and advanced variants are described. The next section discusses more specific embodiments and technical implementation details.

[0024] General examples and advanced variants

[0025] refer to Figure 1~4 First, an embodiment involving a spin-orbit coupling device 100 is described. Note that "spin-orbit coupling device" is synonymous with "spin-orbit interaction device", that is, a device capable of realizing spin-orbit interaction.

[0026] The device 100 comprises a confinement portion 8 designed to confine charge carriers that may drift therein. Current devices may rely on electron kinetics. In other embodiments, the charge carriers may be holes, since nonlinear spin-orbit interactions also occur in hole systems.

[0027] The limiting part 8 also includes circuits 1,4. The circuit comprises in particular an input device 1 which can be excited to inject spin polarization 2 into...

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Abstract

The present invention is notably directed to a spin-orbit coupled device. This device comprises a confinement part. It further includes a circuitry, having an input device, energizable to inject spin-polarizations to charge carriers in an input region of the confinement part. The circuitry further comprises an output device, usable to detect spin-polarizations of charge carriers in an output region of the confinement part. The confinement part may be configured to subject charge carriers drifting therein to a non linear spin-orbit interaction, which causes to rotate a spin polarization of thedrifting charge carriers by an angle that depends non-linearly on momenta of such charge carriers. The circuitry may be configured to allow momenta of charge carriers drifting in the confinement partto be varied, while injecting spin-polarizations in the input region. Varying momenta allows spin-polarizations of drifting charge carriers to be rotated, owing to said non-linear spin-orbit interaction.

Description

Background technique [0001] The present invention generally relates to the field of spintronics. In particular, it relates to devices and methods that rely on nonlinear spin-orbit interactions to realize functions such as current-spin conversion and amplified spin polarization. [0002] Spintronics is a field of electronics that uses the spin-momentum of charge carriers in addition to charge to generate or process signals. Signals can be processed through communication, storage, sensing or logic applications. [0003] Many concepts based on electron spin have been proposed. In particular, spin devices have been proposed which include a spin transport layer (or STL) on top of a substrate. Connected to the STL are input and output electrodes. The input electrode acts as a spin injection contact and consists of a magnetized material that is magnetized in one of two possible directions (spin up / down). By passing a current between the input electrode and the STL, spin-polarize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L29/06
CPCG11C11/1675G11C11/18H01L29/08H01L29/10H01L29/66984H03K19/23
Inventor P·B·奥尔特曼G·R·萨利斯
Owner IBM CORP
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