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30 papers · 1 filter
Direct Observation of the Zigzag Edge States of a Supramolecular Diatomic Kagome Lattice
Ryohei Nemoto, Xiangzhi Meng, Behzad Mortezapour +11
Lattice geometry plays a fundamental role in the behavior of Bloch electrons in a crystal. The diatomic Kagome lattice, an extension of the honeycomb and Kagome lattices, is predic…
Electrical Spectroscopy of Intervalley Relaxation in WSe Transistors
Katsunori Wakabayashi
We show that the transconductance of multilayer WSe field-effect transistors serves as a direct electrical spectrometer of the intervalley relaxation time , previou…
Transconductance as a Probe of Valley Thermodynamics in Multilayer WSe
Katsunori Wakabayashi, Souren Adhikary, Tomoaki Kameda
Transconductance is a central figure of merit in field-effect transistors, typically governed by charge accumulation and carrier mobility. In multilayer WSe transistors, howeve…
Topological Charges, Fermi Arcs, and Surface States of Crystal
Shoya Yoshida, Katsuhiro Takahashi, Katsunori Wakabayashi
We investigate the topological electronic properties of the crystal by constructing a tight-binding model. The bulk band structure hosts Weyl nodes with higher and convention…
Optically induced spin Hall current in Janus transition-metal dichalcogenides
Tomoaki Kameda, Katsunori Wakabayashi
Monolayer Janus transition-metal dichalcogenides (TMDCs), such as WSeTe, exhibit Rashba-type spin-orbit coupling (SOC) due to broken out-of-plane mirror symmetry. Here, we theoreti…
Approximating Maximally Localized Wannier Functions with Position Scaling-Eigenfunction
Yuji Hamai, Katsunori Wakabayashi
Position scaling-eigenfunctions are generated by transforming compactly supported orthonormal scaling functions and utilized for faster alternatives to maximally localized Wannier…