Fumito Araoka

Science and Application of Ferroelectric Nematics

Grant No.：JPMJCR23O1

Research Director : Fumito Araoka

Collaborator

Koki Sano	Associate Professor Academic Assembly Shinshu University
Go Watanabe	Professor School of Frontier Engineering Kitasato University

Outline

We pursue science and technology of ferroelectric nematics, that possess unconventional polar nature in a fluid state. Relationships between their unprecedented physical properties and unclarified polarizaiton stabilization mechanism of the ferroelectric nematics will be elucidated by fusion of state-of-the-art experimental and computational analysis techniques. In addition, epoch-making material functions and applications based on ferroelectric nematics, which are hardly reazlied in the conventional solid-state ferroelectrics, will also be innovated by utilizing their unique properties based on the high fluidity, such as uniformity, shape-adaptability, and solubility.

Akinori Saeki

Development of Exploration Methods of Photoelectric Conversion Films and Establishment of Microwave Dielectric Fundamentals

Grant No.：JPMJCR23O2

Research Director : Akinori Saeki

Collaborator

Fumitaka Ishiwari	Associate Professor Graduate School of Urban Environmental Sciences Tokyo Metropolitan University
Hiroyuki Tamura	Professor Faculty of Science and Engineering Konan University
Aiko Fukazawa	Professor Institute for Advanced Study Kyoto University

Outline

Through a combinatorial synthesis of diverse organic and inorganic semiconductors along with an integration of data science and experimental screening, we explore materials and processes that break through existing concepts at an unprecedented speed. We assemble a team with expertise in measurements, device physics, polymer chemistry, structural organic chemistry, typical element chemistry, quantum chemistry, and machine learning with an aim at pioneering unexplored photovoltaic materials that cannot be reached solely by interpolation and extrapolation and establishing their fundamental science.

Shu Seki

Giant CISS Materials: An Approach for Spin and Translational Momentum of Positrons and Electrons as Interfaces

Grant No.：JPMJCR23O3

Research Director : Shu Seki

Collaborator

Atsuo Kawasuso	Senior Researcher Takasaki Institute for Advanced Quantum Science National Institutes for Quantum Science and Technology
Taishi Takenobu	Professor Graduate School of Engineering Nagoya University
Motoaki Hirayama	Unit Leader Center for Emergent Matter Science RIKEN

Outline

We approach toward a series of giant Chirality Induced Spin Selectivity (CISS) materials for positrons and electrons with new materials design concepts: 1) breaking Wallach rule in chiral covalent organic frameworks, 2) chiral interlayer space design in transition metal dichalcogenides, 3) topological design of layered structures of 2D materials, and 4) 3D chiral crystals with unique design at the interfaces. Fundamental understanding of CISS effects is addressed via validation of CISS effects against anti-matter of electrons: positrons. Spin-polarized positron annihilation spectroscopy is combined with time resolved microwave conductivity measurement technique, elucidating total landscape of positron and electron momentum at screened interfaces in the materials systems.

Shinichiro Seki

Exploration of novel altermagnetic materials and their functional responses

Grant No.：JPMJCR23O4

Research Director : Shinichiro Seki

Collaborator

Ryotaro Arita	Professor Graduate School of Science The University of Tokyo
Atsushi Tsukazaki	Professor Graduate School of Engineering The University of Tokyo
Satoru Hayami	Professor Graduate School of Science Hokkaido University

Outline

Altermagnet is a new concept theoretically proposed in 2020s, and is expected to serve as the “third” class of magnetic material that combines the advantage of traditional ferromagnets and antiferromagnets. In this study, we explore novel altermagnetic materials and their exotic functional responses, based on the comprehensive theoretical investigations.