Kei Kinoshita

Subband electronics based on two-dimensional layered materials

Grant No.：JPMJPR25H1

Researcher : Kei Kinoshita

Outline

Few-layer transition metal dichalcogenides exhibit subband structures due to the quantization of electronic states in the out-of-plane direction. Building on these subband properties, this project aims to develop subband electronics based on van der Waals heterostructures of two-dimensional layered materials. Specifically, the objectives are to realize high-frequency oscillators through subband resonant tunneling and to detect the photoresponse of intersubband transitions, thereby paving the way for next-generation quantum-well electronic and optoelectronic devices.

Satoshi Kusaba

Textile engineering of optical selection rules and its application to infrared detectors

Grant No.：JPMJPR25H2

Researcher : Satoshi Kusaba

Outline

Anisotropic dielectric materials with wavelength-scale helical structures are expected to exhibit unconventional optical selection rules and propagation characteristics. Carbon nanotubes, with their extreme aspect ratio, flexibility, and controllable alignment, provide an ideal platform to realize herically structured anisotropic materials. However, the fabrication of wavelength-scale structures and their optical properties remain unexplored. This project will develop “textile engineering” techniques to control spatial distribution of nanotube assemblies, elucidate their impact on optical selection rules, and ultimately pave the way for applications to infrared and terahertz detectors.

Yoichi Shiota

Development of Functional Magnon Devices via Interface and Nanostructure

Grant No.：JPMJPR25H3

Researcher : Yoichi Shiota

Outline

In this project, we aim to establish a physical platform that enables the control of magnon degrees of freedom such as wave vector, phase, and polarity through interface and nanostructure engineering. Furthermore, by exploiting interaction with spin structures and two-dimensional materials, we will explore the creation of functional magnon devices and their potential as energy-efficient information carriers. By harnessing the wave nature and multiple degrees of freedom of magnons, this study will present new principles for charge-free, high-performance spin-based information processing.

Yuta Seo

Science of reconfigurable van der Waals junctions using two-dimensional material probes

Grant No.：JPMJPR25H4

Researcher : Yuta Seo

Outline

Reconfigurable van der Waals (vdW) junctions where the relative position and the twist angle between two-dimensional materials are continuously tunable can be realized by utilizing a special two-dimensional material probe, which is a cantilever covered with two-dimensional materials. In this project, I try to create novel physical properties and functions unique to the reconfigurable vdW junctions via continuous twist angle modulation, atomic layer sliding, and precise control of junction position.

Ikuma Tateishi

Development of theoretical methodology to analyze the nanoscroll system

Grant No.：JPMJPR25H5

Researcher : Ikuma Tateishi

Outline

In this project, I develop a theoretical methodology to analyze the electronic properties of nanoscroll systems. Focusing on the interference pattern found between adjacent walls in the nanoscroll, I apply the techniques used for the moire material in the analysis of nanoscrolls. With the developed methodology, I analyze some typical nanoscroll systems, transitional metal dichalcogenide (TMDC) nanoscrolls, Janus TMDC nanoscrolls, and graphene nanoscrolls. Based on these researches, I aim to establish the nanoscroll system as ‘multi-layered 1D nano-material’ that can be applied to various kinds of nano-devices.

Tomoya Nakamura

Development of High-Sensitivity Perovskite Photodetectors via Interfacial Structure Control

Grant No.：JPMJPR25H6

Researcher : Tomoya Nakamura

Outline

In this study, I aim to develop photodetectors based on lead–tin (Pb–Sn) mixed halide perovskite semiconductors. Based on my expertise in materials science and device fabrication, I will conduct detailed structural analysis of two-dimensional perovskite crystals and precisely control the interfacial structure of the perovskite layers at the molecular level to minimize dark current. The ultimate goal is to realize next-generation photodetectors with highly sensitive near-infrared light detection, surpassing the performance of conventional silicon-based devices.

Shinichi Nishihaya

Exploring quantum transport functionalities via nanostructure control in free-standing high-mobility membranes

Grant No.：JPMJPR25H7

Researcher : Shinichi Nishihaya

Outline

Spatially non-uniform local structures and curved geometries can serve as new sources of novel electronic properties and quantum functionalities through the induced effective fields and interactions that are absent on conventional flat crystal planes. This study employs free-standing membranes of high-mobility materials as a research platform to explore transport functionalities in structures designed with strain, bending, and folding across multiple length scales. In particular, we focus on the elastic control of topological electronic phases, chiral electromagnetic responses, and quantum transport under inhomogeneous fields, aiming to realize unprecedented quantum functionalities.

Manato Fujimoto

Theoretical study of exotic phenomena in two-dimensional superlattices

Grant No.：JPMJPR25H8

Researcher : Manato Fujimoto

Outline

We explore materials capable of mimicking zero-field Landau levels through diverse superlattice structures such as moiré superlattices and periodic distortions. Furthermore, we will theoretically verify the physical properties of novel quasiparticles arising there—skyrmions and anyons—and their condensed phases, such as skyrmion superconductivity and anyon superconductivity. Achieving this research plan will establish guidelines for material design, elucidate unique physical phenomena in two-dimensional superlattice systems, and open possibilities for creating novel high-performance devices.

Hideki Matsuoka

Engineering van der Waals Interlayers with Asymmetric Molecules for Novel Two-Dimensional Quantum Phases

Grant No.：JPMJPR25H9

Researcher : Hideki Matsuoka

Outline

This study aims to create novel two-dimensional quantum phases by constructing organic–inorganic superlattice structures that combine asymmetric organic molecules with van der Waals materials. By intercalating molecules with chirality or magnetism, we seek to induce symmetry-breaking and elucidate their atomic and electronic structures through experimental probes. Furthermore, by fabricating cleaved nanodevices, we will examine emergent functionalities in nano-scale device. Through these approaches, we will establish a new framework that integrates quantum materials science with molecular functional science, thereby opening a pathway toward the design and control of quantum phases through organic–inorganic hybrid architectures.

Mahito Yamamoto

Reconfigurable coupled nano-oscillators based on phase transition materials

Grant No.：JPMJPR25HB

Researcher : Mahito Yamamoto

Outline

Coupled oscillators-based Ising machines have attracted much attention as efficient solvers of combinatorial optimization problems. This research project aims to create tunable coupled oscillators using phase transition materials and two-dimensional materials, for the realization of highly efficient, versatile, and integratable Ising machines.