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Machida Lab
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The lab stacks and twists atomic layers to create new quantum properties and devices.
AboutAbout the lab
Stacking atomic layers to control quantum behavior
The Machida Lab studies the properties of structures made by stacking two-dimensional materials such as graphene, and their application to devices.
Two-dimensional materials are the ultimate in thinness, with a thickness of just a single layer of atoms.
When different types of atomic layers are stacked with even the stacking angle (the twist angle) controlled, the possible combinations are endless, and surprising properties can sometimes emerge.
Building on its original stacking technology, the lab explores new phenomena by stacking, twisting, and bending atomic layers, with the aim of leading to next-generation quantum electronics.
Key terms
- Two-dimensional materials
- Sheet-like materials, such as graphene, that are only one to a few atomic layers thick
- Moiré superlattice
- A striped pattern with a longer period than the original crystal, which appears when two atomic layers are stacked with a slight offset
- Quantum tunneling
- A phenomenon in which, owing to the properties of quantum mechanics, an electron passes through a thin barrier that it could not otherwise cross
NewsLab news
A graduate received the Young Researcher Encouragement Award at the 70th Fullerenes-Nanotubes-Graphene General Symposium
A doctoral student received the CSW2026 Best Student Paper Award
Lecturer Seo received the Young Researcher Encouragement Award at the area meeting of the Transformative Research Areas (A)
A paper on a stacking method for creating one-dimensional moiré superlattices was published in ACS Nano
A master's student received the Dean's Award of the Graduate School of Engineering and the Materials Engineering Outstanding Master's Thesis Award
ResearchResearch themes
Built on its original van der Waals stacking technology, the lab aims to create next-generation quantum electronics from the frontier of solid-state physics opened up by two-dimensional materials. Its work covers techniques for building devices by stacking atomic layers, elucidating quantum transport phenomena in extreme environments, and developing quantum well devices.
*Illustrative imageStacking atomic layers at will
Using an original stacking system, the lab aligns atomic layers such as graphene and boron nitride precisely in both position and angle and stacks them to create "artificial crystals" that do not exist in nature. It is also developing "atomic-layer origami," a technique for folding atomic layers.
*Illustrative imageExploring quantum transport phenomena in extreme environments
By measuring electrical conduction in environments that combine extremely low temperatures, strong magnetic fields, and high pressure, and by making precise measurements with AFM, the lab investigates the new quantum properties produced by moiré superlattices. Through observations such as the quantum Hall effect, it aims to discover new physical laws.
*Illustrative imageDevices built from atomic-layer quantum wells
Using "vdW quantum wells," whose thickness is precisely controlled at the atomic-layer level, the lab aims to create high-frequency oscillation devices in the GHz to THz range and ultrafast logic devices, making use of quantum tunneling and negative differential resistance.
MembersFaculty
The members of the Machida Lab consist of faculty, administrative and technical support staff, and doctoral and master's students.As of 2026
- ProfessorTomoki MachidaPublications ↗
- Project Associate ProfessorRai Moriya
- LecturerYuta Seo
- Assistant ProfessorKei Kinoshita
- Project Assistant ProfessorMomoko Onodera
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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: “Moire of twisted bilayer graphene” Ponor / CC BY-SA 4.0 (cropped)
- Stacking atomic layers at will: “Kristallstruktur Wolframdiselenid” Orci / CC BY-SA 3.0 (cropped)
- Exploring quantum transport phenomena in extreme environments: “Gold Cryostat 8K-4” Onri Jay Benally / CC BY-SA 2.0 (cropped)
- Devices built from atomic-layer quantum wells: “Quantum Well A-B” Rhadamante / CC BY-SA 4.0 (cropped)
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