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Nanoelectronic Devices Lab
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The lab aims for low-power memory and circuits using electron spin.
AboutAbout the lab
Using electron spin to create new devices
The Nanoelectronic Devices Lab studies "spintronics," which makes use of both the charge and the spin of electrons.
The lab freely controls the spin state of electrons in various materials, such as ferromagnets and semiconductors, to create devices with new functions.
Using half-metals, ferromagnets in which spin direction is 100% aligned, the lab works on technologies leading to next-generation ultra-high-capacity, ultra-low-power memory and logic circuits.
Toward quantum information devices that use spin, the lab also investigates the properties of electron spins and nuclear spins in semiconductors.
Key terms
- Spintronics
- Electronics that uses both the charge of electrons and spin, their magnet-like property.
- Half-metal
- A ferromagnet in which the spin direction of electrons is 100% aligned.
- Ferromagnetic tunnel junction
- A structure in which an extremely thin insulator is sandwiched between two thin magnetic films. How easily current flows changes with the direction of magnetization.
NewsLab news
View More ↗ResearchResearch themes
The lab studies spintronics, which actively uses the spin state of electrons to build a new framework of devices. By freely controlling spin in ferromagnets and semiconductors, it aims for technologies leading to next-generation ultra-high-capacity, ultra-low-power memory and logic circuits.
*Illustrative imageSpintronics with Half-Metals
The better the spin directions are aligned in a ferromagnet, the better the characteristics of a spintronic device. The lab therefore studies devices that use half-metals, a new type of ferromagnet in which spin direction is 100% aligned.
*Illustrative imageTunnel Junctions of Heusler Alloys
In ferromagnetic tunnel junction devices using Co-based Heusler alloys, a type of half-metallic ferromagnet, the lab achieved operation with a very high ON/OFF ratio. This is a technology that will be central to future green electronics.
*Illustrative imageSpin Injection into Semiconductors and Nuclear Spins
The lab succeeded in injecting spin-aligned electrons from Heusler alloys into semiconductors with high efficiency, moving closer to realizing a spin transistor. Toward quantum information devices, it also investigates the properties of electron spins and nuclear spins in semiconductors.
*Illustrative imageA New Principle for Moving Domain Walls with Current
The lab studies "current-induced domain wall motion," in which an electric current reverses the direction of a magnet. In joint research with the Japan Atomic Energy Agency, it experimentally confirmed for the first time the effective magnetic field produced by a torque based on a new principle that originates from Weyl points.
MembersFaculty
The members of the Nanoelectronic Devices Lab are faculty and students in the doctoral, master's, and undergraduate programs.As of 2024
- ProfessorTetsuya Uemura
- Associate ProfessorMichihiko Yamanochi
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “CMOS magnetische Blasendomänen” Matesy GmbH / CC BY-SA 3.0 (cropped)
- Spintronics with Half-Metals: “Ferrofluid in magnetic field” Steve Jurvetson / CC BY 2.0 (cropped)
- Tunnel Junctions of Heusler Alloys: “MTJ with Transparent Background” OJB Quantum / CC BY 4.0 (cropped)
- Spin Injection into Semiconductors and Nuclear Spins: “5C2A5953R - – Silicon Wafer 20200519” Rob Bulmahn / CC BY 2.0 (cropped)
- A New Principle for Moving Domain Walls with Current: “CMOS Mäanderdomänen” Matesy GmbH / CC BY-SA 3.0 (cropped)
- Related lab (Integrated Nanosystems Lab): “Нейрон коры с множеством дендритных шипиков” Sergb95 / CC BY-SA 4.0 (cropped)
- Related lab (Nano Material Properties Engineering Lab): “Stretchable Electronics” Steve Jurvetson from Menlo Park, USA / CC BY 2.0 (cropped)
- Related lab (Organic Quantum Photonic Devices Lab): “« Batteries et innovation » Laboratoire de Physique de la Matière Condensée Laboratoire de Physique des Interfaces et Couches Minces Thématique « Innovation et applications industrielles » ( )” Ecole polytechnique Université Paris-Saclay / CC BY-SA 2.0 (cropped)
- Related lab (Electromagnetic Engineering Lab): “Manitoba Hydro-BipoleII Valve” Wtshymanski at English Wikipedia / Public domain (cropped)
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