331 citations
- Kiryu UniversityJP36 papers
- Ibaraki UniversityJP30 papers
- Kyoto UniversityJP29 papers
- The University of TokyoJP27 papers
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- Chapman UniversityUS16 papers
- National Astronomical Observatory of JapanJP16 papers
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- Japan Science and Technology AgencyJP14 papers
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251 papers
Noise-Robust Frequency Estimation via Overlapped Sampling-Intervals Zero-Crossing Fitting
Phichai Youplao, Nithiroth Pornsuwancharoen, Yusaku Fujii
The trade-off between noise averaging and temporal resolution fundamentally limits conventional zero-crossing frequency estimators under dynamic and noisy conditions. This paper pr…
Correlation functions at the topological quantum phase transition in the S=1 XXZ chain with single-ion anisotropy
Toshiya Hikihara, Akira Furusaki
We study the one-dimensional S=1 XXZ spin model with single-ion anisotropy. It is known that at the transition points between the Haldane and large-D phases, the model exhibits a q…
Distortion of charge distribution due to internal electric fields described by the drift-diffusion semiconductor model
Masakazu Yamamoto
In this paper, the initial value problem for the Debye--Hueckel drift-diffusion equation is studied. This equation was introduced as a model describing plasma behavior and is also…
Tree-Graph Based Construction of Quantum Spin Models with Exact Ground State
Toshiya Hikihara
We propose a protocol to generate an antiferromagnetic S=1/2 Heisenberg model with the exact ground state based on a tree graph. The generated model has a correspondence with a tre…
Determining the density of in-gap states in organic semiconductors: A pitfall of photoelectron yield spectroscopy
Ryotaro Nakazawa, Masaya Kitaoka, Ryota Kaimori +4
Accurate determination of low-density electronic states in the bandgap (in-gap states) is crucial for optimizing the performance of organic optoelectronic devices. Derivative photo…
Hexagonal boron nitride/bilayer graphene moiré superlattices in the Dirac-material family: energy-band engineering and carrier doping by dual gating
Takuya Iwasaki, Yoshifumi Morita
We review the fabrication and transport characterization of hexagonal boron nitride (hBN)/Bernal bilayer graphene (BLG) moiré superlattices. Due to the moiré effect, the hBN/BLG mo…