111 citations
- Tohoku UniversityJP5 papers
- RIKEN Center for Emergent Matter ScienceJP3 papers
- Advanced Institute of Materials ScienceJP2 papers
- Japan Science and Technology AgencyJP1 paper
- Princeton UniversityUS1 paper
- RIKENJP1 paper
- Saint Petersburg Mining UniversityRU1 paper
- Spintronics Research Network of JapanJP1 paper
- Technical University of Malaysia MalaccaMY1 paper
- The University of TokyoJP1 paper
- Tohoku University HospitalJP1 paper
- Toyama Prefectural UniversityJP1 paper
7 papers
Probing electron trapping by current collapse in GaN/AlGaN FETs utilizing quantum transport characteristics
Takaya Abe, Motoya Shinozaki, Kazuma Matsumura +6
GaN is expected to be a key material for next-generation electronics due to its interesting properties. However, the current collapse poses a challenge to the application of GaN FE…
Channel length dependence of the formation of quantum dots in GaN/AlGaN FETs
Kazuma Matsumura, Takaya Abe, Takahito Kitada +5
Quantum dots can be formed in simple GaN/AlGaN field-effect-transistors (FETs) by disordered potential induced by impurities and defects. Here, we investigate the channel length de…
An analysis of voltage source inverter switches fault classification using short time Fourier transform
Mustafa Manap, Srete Nikolovski, Aleksandr Skamyin +3
The dependability of power electronics systems, such as three-phase inverters, is critical in a variety of applications. Different types of failures that occur in an inverter circu…
Formation of quantum dots in GaN/AlGaN FETs
Tomohiro Otsuka, Takaya Abe, Takahito Kitada +3
GaN and the heterostructures are attractive in condensed matter science and applications for electronic devices. We measure the electron transport in GaN/AlGaN field-effect transis…
Discretized Topological Hall Effect Emerging from Skyrmions in Constricted Geometry
N. Kanazawa, M. Kubota, A. Tsukazaki +6
We investigate the skyrmion formation process in nano-structured FeGe Hall-bar devices by measurements of topological Hall effect, which extracts the winding number of a spin textu…
Spin susceptibility and effective mass of two-dimensional electrons in MgxZn1-xO/ZnO heterostructures
A. Tsukazaki, A. Ohtomo, M. Kawasaki +9
We report measurements of the spin susceptibility and the electron effective mass for two-dimensional electrons confined at the interfaces of MgxZn1-xO/ZnO single heterostructures…