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Yamada Lab
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A lab that moves atoms and molecules one at a time to build the qubits of the future.
AboutAbout the lab
From a single atom to a future qubit.
The Yamada Lab develops qubit materials while observing atoms and molecules with a scanning tunneling microscope.
A scanning tunneling microscope traces a surface with a sharp needle and can distinguish individual atoms.
The lab develops this microscope itself and creates quantum magnets in which atomic magnets are bound together by organic molecules.
The instruments are kept in ultrahigh vacuum and at extremely low temperatures, and individual atoms and molecules are observed in an environment close to outer space.
Key terms
- Scanning tunneling microscope
- A microscope that brings a sharp needle close to a surface and images the bumps of individual atoms from the current that flows.
- Quantum spin
- A property of electrons and atoms that corresponds to the direction of a magnet. It is what a qubit is made of.
- Qubit
- The smallest unit that carries information in quantum computers and quantum sensors.
NewsLab news
Atomic-scale one-dimensional stripe structures formed on an iron surface by argon ion sputtering
Succeeded in keeping iron atoms stable on a 1-nanometer insulating film
Controlled the two superconducting phases of lead through offsets in atomic stacking
Succeeded in creating one-dimensional electron stripe structures in a two-dimensional thin film
Succeeded in fabricating isolated quantum spins on the surface of a magnet
ResearchResearch themes
The lab is taking on the development of "organic qubits," in which single atomic magnets on a solid surface are bridged by organic molecules. With the goal of "creating, observing, and using" quantum spins, the research proceeds while the lab develops its own scanning tunneling microscopes.
*Illustrative imageCreating Quantum Spins
By combining atoms and molecules on a substrate surface, the lab produces two-dimensional films with any desired shape. By synthesizing organic molecules and magnetic atoms in vacuum, it aims to create quantum magnets whose design can be changed and that can be mass-produced.
*Illustrative imageProtecting and Manipulating Quantum Spins
It was found that qubits are destroyed when they touch a metal directly, so the lab has developed protective layers such as oxides, organic molecular films, and graphene. It is also researching how to manipulate quantum spins by shining light or adsorbing lightweight molecules.
*Illustrative imageObserving Quantum Spins
The orientation of a magnet's north and south poles is invisible to the eye. Using a spin-polarized scanning tunneling microscope, which it has been developing since 2003, the lab directly observes the tiny quantum spins of atoms and molecules.
*Illustrative imageUsing Quantum Spins
To make quantum spins work as qubits, the lab combines magnetic resonance techniques with an ultrahigh-vacuum, cryogenic spin-polarized scanning tunneling microscope. It is also working on controlling quantum spin states with nanosecond pulses.
MembersFaculty
The members of the Yamada Lab consist of faculty and doctoral, master's, and undergraduate students.As of 2026
- Associate ProfessorToyokazu Yamada
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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: “Scanning tunneling microscope-MHS 2237-IMG 3818” Rama / CC BY-SA 3.0 fr (cropped)
- Creating Quantum Spins: “ESR-STM at QNS in Ewha - front view” Rickinasia / CC BY-SA 4.0 (cropped)
- Protecting and Manipulating Quantum Spins: “Copper oxide thin-film interference” Infinirivative / CC BY 4.0 (cropped)
- Observing Quantum Spins: “Atomic Force Microscopy (AFM) tip attached to a tuning fork” Dinesh.dhankhar / CC BY 4.0 (cropped)
- Using Quantum Spins: “Measuring a qubit leaves no room for error” FMNLab / CC BY 4.0 (cropped)
- Related lab (Aoki Lab): “Molybdenite in quartz” Eurico Zimbres Zimbres / CC BY-SA 3.0 (cropped)
- Related lab (Krüger-Iwahara Lab): “Desyxps” MichaelBueker / CC BY 3.0 (cropped)
- Related lab (Surface Electrochemistry Lab): “Platinum-crystals” Jurii / CC BY 3.0 (cropped)
- Related lab (Ishii-Fukagawa Lab): “AMOLED display microphoto 002 front ( )” Jan Helebrant / CC BY-SA 2.0 (cropped)
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