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Hatsugai-Mizoguchi-Sone Lab
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A condensed matter theory lab that explores, through theory, the new principles hidden within matter.

AboutAbout the lab
Exploring new principles and structures through condensed matter theory
The lab conducts theoretical research in condensed matter physics.
Using analytic, so-called topological methods as well as numerical methods, it carries out research across a wide range of fields.
The lab believes that new physical principles, mechanisms, and structures lie hidden within matter, and aims to uncover the as-yet-unrevealed "structure of nature."
In recent years, its main work has been to generalize the concept of bulk-edge correspondence, which arose from the study of topological phases, and to universalize it broadly as the "science of bulk-edge correspondence."
Key terms
- Condensed matter physics
- The field that seeks to understand the properties of various materials and to clarify the phenomena occurring in them from the viewpoint of physics
- Bulk-edge correspondence
- A concept that arose in the course of studying topological phases. Research on generalizing it is under way
- Graphene
- A material in which carbon atoms are arranged in a single-layer, two-dimensional honeycomb lattice
- Berry connection
- A geometric phase intrinsic to quantum theory. It plays an important role in analyzing the quantum Hall effect in graphene
NewsLab news
Introducing a paper on nonlinearity and topology
Introducing a paper that proposes a model in which flat bands appear in a pentagonal atomic network
ResearchResearch themes
The lab believes that new physical principles, mechanisms, and structures lie hidden within matter, and aims to uncover the as-yet-unrevealed "structure of nature." It uses analytic, so-called topological methods as well as numerical methods to conduct research across a wide range of fields.
*Illustrative imageThe Science of Bulk-Edge Correspondence
In recent years, the lab has mainly worked on generalizing the concept of bulk-edge correspondence, which arose in the course of studying topological phases, and universalizing it broadly.
*Illustrative imageGraphene and the Berry Connection
Electrons on the honeycomb lattice of single-layer carbon are called relativistic Dirac particles in a solid, and a fractal structure appears in their energy levels when a magnetic field is applied. In analyzing the quantum Hall effect, the Berry connection, a geometric phase intrinsic to quantum theory, plays an important role.
MembersFaculty
The lab's members consist of faculty members and students in the doctoral and master's programs.
- ProfessorYasuhiro Hatsugai
- Associate ProfessorTomonari Mizoguchi
- Assistant ProfessorKazuki Sone
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: “Crystal lattice with hugin sky background” Engelbert Niehaus / CC BY 4.0 (cropped)
- The Science of Bulk-Edge Correspondence: “Magnet 4” Peter Nussbaumer / CC BY-SA 3.0 (cropped)
- Graphene and the Berry Connection: “GrapheneLattice” Ququ / CC BY-SA 3.0 (cropped)
- Related lab (ナノ構造物性研究室): “Fullerene-C70-3D-sticks” Jynto (talk) / CC0 (cropped)
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(守友研究室) ): “Solar panel research, Sandia National Laboratories, 2021” U.S. Department of Energy / Public domain (cropped) - Related lab (光ナノ物性
(野村研究室) ): “Lasertests” The Air Force Research Laboratory’s Directed Energy Directorate / Public domain (cropped) - Related lab (ナノフォトニクス
(舛本・ 池沢研究室) ): “Laser Diode Module” Robert Howie from Perth, Australia / CC BY-SA 2.0 (cropped)
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