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Takayama Lab
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A lab that investigates the unusual two-dimensional physics occurring at the surfaces of materials.
AboutAbout the lab
New physics lives at the edge.
The Takayama Lab studies physical phenomena that occur at the "surface" of materials.
A crystal is a state in which atoms are arranged periodically in three dimensions, but at its edge, the surface, this periodicity breaks down and two-dimensional properties different from those of the crystal appear.
Low-dimensional worlds such as two-dimensional surfaces and interfaces, one-dimensional edges, and zero-dimensional dots still hold many things that are not yet understood.
Under the motto "create, observe, measure, and understand," the lab investigates these systems using scanning tunneling microscopy, photoelectron spectroscopy, and electron and positron diffraction.
Key terms
- Surface superstructure
- An atomic arrangement that exists only at the surface, created artificially by bonding atoms of another element to the surface of a crystal
- Atomic-layer material
- A sheet-like material that is only a few atoms thick
- Band structure
- The way the energies that electrons can take inside a crystal are arranged. It determines the properties of the material
NewsLab news
Prof. Takayama received the Women Researcher Award from the Vacuum and Surface Science Society of Japan
A doctoral student received a Student Prize at the International Symposium on Vacuum and Surface Science
A master's student received a Student Excellent Presentation Award at the Kanto Chapter Meeting of the Vacuum and Surface Science Society of Japan
ResearchResearch themes
At the "surface," the edge of an object, two-dimensional periodicity different from that of the crystal and physical phenomena unique to surfaces appear. Under the motto "create, observe, measure, and understand," the lab works to elucidate the properties of low-dimensional matter, such as surface superstructures and atomic-layer materials, using experimental techniques including scanning tunneling microscopy, photoelectron spectroscopy, and electron and positron diffraction.
*Illustrative imageAngle-Resolved Photoelectron Spectroscopy
This experiment uses the photoelectric effect, for which Einstein won the Nobel Prize. It can directly determine the band structure of electrons, and students sometimes travel to synchrotron radiation facilities to conduct experiments.
*Illustrative imageScanning Tunneling Microscopy
This experiment brings a probe tip to atomic distances from the surface and measures the current that flows through the tunneling effect. By measuring the density of states of electrons, it reveals the surface structure and properties of a material.
*Illustrative imagePositron Diffraction
This is a diffraction experiment that uses positrons, the antiparticles of electrons, as the beam, and it is well suited to structural analysis of surface superstructures and thin films. The experiments are carried out in Tsukuba, and the lab co-develops its own analysis software that makes use of data-driven science.
MembersFaculty
The members of the Takayama Lab consist of faculty, assistants, master's students, and undergraduate students.As of 2026
- ProfessorAkari Takayama
VoicesStudent voices
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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: “Si atoms in graphene ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
- Angle-Resolved Photoelectron Spectroscopy: “Aust.-Synchrotron-Soft-X-ray-Beamline-Experimental-Station” jjron / CC BY-SA 3.0 (cropped)
- Scanning Tunneling Microscopy: “ESR-STM at QNS in Ewha - front view” Rickinasia / CC BY-SA 4.0 (cropped)
- Positron Diffraction: “EBSD (001) Si” FuzzyMagma / CC0 (cropped)
- Related lab (高野研究室): “Crowded cytosol” TimVickers / Public domain (cropped)
- Related lab (上田研究室): “Osteosarcoma cells stained for actin, microtubules, and nuclei” Howard Vindin / CC BY 4.0 (cropped)
- Related lab (山田研究室): “Keplers supernova” NASA/ESA/JHU/R.Sankrit & W.Blair / Public domain (cropped)
- Related lab (鷹野研究室): “Crab Nebula” NASA, ESA, J. Hester and A. Loll (Arizona State University) / Public domain (cropped)
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