Voltage Controlled Spin Transport Channel Design
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Solution Overview
Problem
Existing computational devices fail to utilize and maintain electron spin during data transport and storage, requiring higher power inputs and being difficult to manufacture due to structural and material challenges.
Innovation Solution
A spin transport channel comprising a conductive layer, a dielectric layer, an intermediate spin layer, and a polarizer layer, where the intermediate spin layer forms a conducting path through the dielectric layer to transport electrons with maintained polarized electron spin, controlled by a voltage source to enable or disable electron spin transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If existing computational devices are used for data transport and storage, then device complexity is reduced, but electron spin cannot be utilized or maintained and power consumption increases
Solution Approach 1:
The device is divided into distinct functional layers: a conductive layer for electron injection, a dielectric layer for insulation and field control, a spin-active layer for spin polarization maintenance, and a collector layer for electron detection. This segmentation allows each layer to be optimized for its specific function, enabling spin transport while managing device complexity through modular design.
Solution Approach 2:
The spin-active layer acts as an intermediary between the conductive layer and the collector layer, maintaining electron spin polarization during transport. This intermediate layer is crucial for preserving spin information while allowing electron flow, thereby enabling low-power spintronic operation without requiring complete redesign of the entire device architecture.
2Reliability
If existing computational devices are used for data transport and storage, then manufacturing processes are simplified, but electron spin cannot be maintained during use and transport
Solution Approach 1:
The device employs composite material structures where a spin-active material (such as a ferromagnetic or antiferromagnetic layer) is combined with conventional conductive and dielectric materials. This composite approach maintains electron spin polarization through the specialized spin-active layer while using well-established manufacturing techniques for the other layers, thus achieving reliable spin transport without excessive manufacturing complexity.
Solution Approach 2:
Spin polarization maintenance is achieved locally in the spin-active layer rather than requiring all device components to have special properties. The conductive and dielectric layers can be manufactured using standard processes, while only the specific spin-active region requires specialized materials and processing, making the overall device easier to manufacture while maintaining spin reliability.
3Reliability
If a spin transport channel with multiple layers is implemented, then electron spin transport with maintained polarization is achieved, but device structure and manufacturing complexity increase
Solution Approach 1:
The spin maintenance function is extracted and isolated into a dedicated spin-active layer, separate from the conductive and dielectric layers. This extraction allows the spin functionality to be implemented with a single specialized layer rather than requiring complex interactions between multiple specialized components, thereby maintaining spin polarization while reducing overall structural complexity.
Solution Approach 2:
The spin-active layer serves multiple functions: it polarizes electrons, maintains spin polarization during transport, and enables spin-dependent conduction. By making this layer multi-functional, the patent reduces the need for separate components for each function, thereby achieving reliable spin transport with a simpler overall structure compared to devices that require separate elements for polarization, transport, and detection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient, low-power electron spin transport with maintained polarization, allowing for controlled information transfer and reducing manufacturing complexities by using a voltage-controlled spin transport channel.
Implementation Method 1
The intermediate spin layer forms a conducting path through the dielectric layer configured to transport a plurality of electrons. Each of the plurality of electrons maintains a polarized electron spin.
Implementation Method 2
A voltage source is electrically coupled to the spin transport channel. The intermediate spin layer forms a conducting path through the dielectric layer to transport a plurality of electrons having a respective polarized electron spin in response to a voltage from the voltage source.
Data Source
AI summary
A spin transport channel includes a dielectric layer contacting a conductive layer. The dielectric layer includes at least one of a tantalum oxide, hafnium oxide, titanium oxide, and nickel oxide. An intermediate spin layer contacts the dielectric layer. The intermediate spin layer includes at least one of copper and silver. The conductive layer is more electrochemically inert than the intermediate spin layer. A polarizer layer contacts the intermediate spin layer. The polarizer layer includes one of a nickel-iron based material, iron, and cobalt based material. The conductive layer and intermediate layer are disposed on opposite sides of the dielectric layer. The dielectric layer and the polarizer layer are disposed on opposite sides of the intermediate spin layer. The intermediate spin layer is arranged to form a conducting path through the dielectric layer configured to transport a plurality of electrons. Each of the plurality of electrons maintains a polarized electron spin.