Osamu Sugino

TL;DR: In this article, a pseudopotential plane-wave scheme is modified at the Poisson solver part with the help of the Green's function technique to screen the excess surface charge.

TL;DR: In this article, the validity of the electron counting (EC) rule was examined for the GaAs surfaces, and supplemental factors to determine stable surface structures were obtained. But the results of the total energy minimization calculation demonstrate that the EC rule holds very well within the models that contain at most one layer with defects and no interlayer N-N and B-B bonds.

TL;DR: This work presents a detailed investigation of the β_{12} sheet, which is a borophene structure that can form spontaneously on a Ag(111) surface, and suggests monolayer boron as a new platform for realizing novel high-speed low-dissipation devices.

TL;DR: The discovery of two-dimensional Dirac nodal line fermions in monolayer Cu2Si is reported based on combined theoretical calculations and angle-resolved photoemission spectroscopy measurements to establish Cu2 Si as a platform to study the novel physical properties in two- dimensional Dirac materials and provide opportunities to realize high-speed low-dissipation devices.

TL;DR: In this paper, the ribbons with armchair edge were found to have phonon frequencies near 2000 kHz, which has been solely ascribed to the one-dimensional carbon allotrope, carbyne.