The University of Tokyo · 재료과학
이 교수의 연구실은 2차원 물질과 저차원 초전도체의 전자 구조 및 물성에 중점을 두고 있으며, 특히 MoS₂와 WSe₂와 같은 계면계에서의 전자적 및 광전기적 현상, 특히 초전도성의 최적화와 밴드 구조 제어를 통한 신소재 응용을 연구하고 있습니다. 고정밀 전자기입을 통한 캐리어 농도 제어를 바탕으로 초전도 전이 온도의 도메인 형성과 밴드 구조 조절을 규명하고 있으며, 전자기기 응용에 적합한 밴드-밸리 전자공학 기반의 광전자 소자 개발도 진행 중입니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
A dome-shaped superconducting region appears in the phase diagrams of many unconventional superconductors. In doped band insulators, however, reaching optimal superconductivity by the fine-tuning of carriers has seldom been seen. We report the observation of a superconducting dome in the temperature-carrier density phase diagram of MoS(2), an archetypal band insulator. By quasi-continuous electrostatic carrier doping achieved through a combination of liquid and solid gating, we revealed a large
Tungsten diselenide (WSe2) and related transition metal dichalcogenides exhibit interesting optoelectronic properties owing to their peculiar band structures originating from the valley degree of freedom. Although the optical generation and detection of valley polarization has been demonstrated, it has been difficult to realize active valley-dependent functions suitable for device applications. We report an electrically switchable, circularly polarized light source based on the material's valley
The fullerene C(60) can be converted into two different structures by high pressure and temperature. They are metastable and revert to pristine C(60) on reheating to 300 degrees C at ambient pressure. For synthesis temperatures between 300 degrees and 400 degrees C and pressures of 5 gigapascals, a nominal face-centered-cubic structure is produced with a lattice parameter a(o) = 13.6 angstroms. When treated at 500 degrees to 800 degrees C at the same pressure, C(60) transforms into a rhombohedra
