LAB LOGA page on LabLog, a review site (not the lab's official page)
Okamoto Lab
Machine-translated · View original
The lab explores quantum phenomena in two-dimensional electrons formed at the surfaces and interfaces of semiconductors.
AboutAbout the lab
Exploring quantum phenomena in the world of two-dimensional electrons
The Okamoto Lab studies the quantum properties of two-dimensional electron systems formed at semiconductor interfaces and surfaces.
In addition to the integer and fractional quantum Hall effects, the lab also investigates electronic states near the metal–insulator transition, where electron–electron repulsion and spin play an important role.
In recent years, the lab has worked on two-dimensional systems created on the surfaces of semiconductors cleaved in ultrahigh vacuum, and has observed the quantum Hall effect at a surface and superconductivity in monatomic-layer metal films.
Graduate students are at the forefront of the lab's research, and starting new research based on fresh ideas is encouraged.
Key terms
- Two-dimensional electron system
- A state in which electrons are confined in a thin layer and can move only within a plane
- Quantum Hall effect
- A phenomenon in which, when a strong magnetic field is applied to two-dimensional electrons, the electrical resistance takes quantized values, such as a fixed value divided by an integer
- Cleavage
- Splitting a crystal along a specific plane. This yields an atomically flat surface
ResearchResearch themes
Targeting two-dimensional electron systems formed at semiconductor interfaces and surfaces, as well as monatomic-layer metal films, the lab investigates quantum phenomena such as the quantum Hall effect and superconductivity at extremely low temperatures and in strong magnetic fields, in search of new phenomena. In addition to electrical transport measurements, the lab also observes electronic states using scanning tunneling microscopy.
*Illustrative imageTwo-dimensional electron systems on cleaved surfaces
The lab developed a technique for cleaving semiconductors such as InAs and InSb in ultrahigh vacuum at extremely low temperatures and depositing metal atoms on the surface to create two-dimensional electron systems. It observed the quantum Hall effect for the first time in a surface two-dimensional system, and is also building an apparatus that can measure electrical conduction while observing electronic states with a scanning tunneling microscope.
*Illustrative imageSuperconductivity in monatomic-layer metal films
On atomically flat cleaved surfaces of GaAs, the lab fabricated ultrathin lead films and observed that superconductivity occurs even in a single atomic layer. In films mixed with a magnetic material, it has also found a phenomenon in which a magnetic field makes the superconductivity more stable.
*Illustrative imageStrongly correlated two-dimensional electron systems and spin
In two-dimensional electron systems such as those in silicon, a metal–insulator transition is observed, in which changing the number of electrons switches the system between a state that conducts electricity and one that does not. Through electrical resistance and electron spin resonance experiments, the lab studies the role that spin plays in liquid and solid states where electron–electron repulsion is strong.
MembersFaculty
The members of the Okamoto Lab consist of faculty and master's students.
- Associate ProfessorTohru OkamotoPublications ↗
- Assistant ProfessorRyuichi MasutomiPublications ↗
VoicesStudent voices
Ratings and reviews reflect the experiences of individual current or former students, not the lab's official views. Whether a lab has reviews, or how many, says nothing about the lab itself.
Students who take part in an interview may receive a thank-you gift worth ¥1,000, regardless of what they say.
Student ratings (0 students)
--
--
--
--
--
--
Student voices answer questions like these
- What's great about this lab?
- What did you learn after joining?
- What's the vibe, and what is the professor like?
- Who is this lab for?
- Where do graduates go?
Your experience can help younger students choose their lab. Your name won't be shown.
Write a lab reviewAnonymous · Your draft is saved if you stopRelatedLabs similar to Okamoto Lab
Shimano LabFaculty of Science, Department of PhysicsSpectroscopic study of electronic properties of solids; ligh…
Tsuji LabFaculty of Science, Department of PhysicsTheoretical condensed matter physics, with interests in none…
Ashida LabFaculty of Science, Department of PhysicsTheoretical research at the interface of quantum many-body p…
Tsuneyuki LabFaculty of Science, Department of PhysicsDevelopment of new first-principles materials simulations an…The information on this page is compiled by the LabLog team from the lab's public information and interviews. For corrections or removal requests, please contact LabLog, not the lab.
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: “Dilution Fridge 008 16K” OJB Quantum / CC BY 4.0 (cropped)
- Two-dimensional electron systems on cleaved surfaces: “Indium antimonide” Alchemist-hp / CC BY-SA 2.0 de (cropped)
- Superconductivity in monatomic-layer metal films: “Atomic resolution Au100” Erwinrossen / Public domain (cropped)
- Strongly correlated two-dimensional electron systems and spin: “12-inch silicon wafer” Peellden / CC BY-SA 3.0 (cropped)
- Related lab (Shimano Lab): “Femtosecond Laser and Pulse Compressor - Optics Lab - INRIM” Giorgio Brida from Torino, Italy / CC BY 2.0 (cropped)
- Related lab (Tsuji Lab): “Cloud of ultracold atoms levitated in a magneto-optical trap” Balping / CC BY-SA 4.0 (cropped)
- Related lab (Ashida Lab): “Superconducting Metamaterial Chip 002” OJB Quantum / CC BY 4.0 (cropped)
- Related lab (Tsuneyuki Lab): “C60 isosurface” Itamblyn / CC BY-SA 4.0 (cropped)
About LabLog
LabLog is a lab review app for students only. Student members at each university interview students in labs and publish what they say. Student voices can only be read by students who sign up with a university email address. Operated by bestiee Inc.
Learn more about LabLog ↗Search engines and AI may reference the basic lab info and rating summaries on this page and the description of LabLog. Student voices are for student members only. Automated collection by programs (scraping, or input to or training of AI) is prohibited under Article 8 of the Terms of Service. If you need data for research or analysis, please contact us.