Xiuzhen Yu

New paradigm of the topological-magnetism science for the beyond-skyrmion era

Grant No.：JPMJCR20T1

Research Director

Xiuzhen Yu

Collaborator

Yasujiro Taguchi	Group Director Center for Emergent Matter Science RIKEN
Masahito Mochizuki	Professor Faculty of Science and Engineering Waseda University

Outline

This project aims to develop a new three-dimensional (3D) magnetic-imaging technique to explore and observe 3D topological spin textures in magnets such as skyrmion-strings, magnetic hedgehogs (monopoles), and hopfions. Using the developed imaging technique, we will open a new paradigm of the topological-magnetism science for the upcoming beyond-skyrmion era by predicting, exploring and verifying emergent phenomena and materials functions of newly discovered topological magnets and topological spin textures.

Motohiko Ezawa

Method of topological quantum computation based on electric circuits

Grant No.：JPMJCR20T2

Research Director

Motohiko Ezawa

Collaborator

Minoru Kawamura	Team leader RIKEN Center for Emergent Matter Science RIKEN
Eiji Saitoh	Professor Graduate School of Engineering The University of Tokyo
Yoshio Mita	Professor Graduate School of Engineering The University of Tokyo

Outline

We verify the emergence of Majorana states in electric circuits by simulating a topological superconductor model. Then, demonstrating that braidings of Majorana states act as quantum gates, we perform basic experiments showing that topological quantum computations are executable based on electric circuits. In addition, we develop variable-electronic elements and ideal-electronic elements necessary for the realization of our proposal. We pave a way to a large-scale implementation based on analogue and digital integrated circuits applying the knowledge of electromechanical systems.

Mikito Koshino

Development of precisely-designed topological 2D materials

Grant No.：JPMJCR20T3

Research Director

Mikito Koshino

Collaborator

Takashi Uemura	Professor Graduate School of Engineering The University of Tokyo
Taro Hitosugi	Professor Graduate School of Science The University of Tokyo

Outline

We develop and engineer precisely-designed 2D materials, such as nanoribbons and two-dimensional / three-dimensional networks, and establish topological band engineering in 2D materials. By combining condensed matter theory, organic chemistry and materials engineering, we theoretically design 2D-material-based superstructures with non-trivial topological electronic properties, fabricate them with the aid of nano-space technology on metal organic framework (MOF), and develop innovative electronic devices.

Yohei Yamamoto

Development of self-organized topological organic microresonators

Grant No.：JPMJCR20T4

Research Director

Yohei Yamamoto

Collaborator

Kenichi Yamashita	Professor Faculty of Electrical Engineering and Electronics Kyoto Institute of Technology
Hiroaki Yoshioka	Associate Professor Graduate School and Faculty of Information Science and Electrical Engineering Kyushu University

Outline

We fabricate topological organic microstructures by precise control of the self-assembly process of molecules. We will construct a laser devices with topological characters such as highly-directional circularly polarized lasers, optical vortex lasers from topological edge optical cavities and room temperature polariton propagation control devices. These devices will be utilized for highly sensitive optical sensing in response to changes in the external environment.