Koji Miyamoto

TL;DR: The finding of a huge spin-orbit interaction effect in a polar semiconductor composed of heavy elements, BiTeI, where the bulk carriers are ruled by large Rashba-likespin splitting is described, confirming that the spin splitting is indeed derived from bulk atomic configurations.

TL;DR: The direct observation of valley-dependent out-of-plane spin polarization in an archetypal transition-metal dichalcogenide--MoS2--using spin- and angle-resolved photoemission spectroscopy is reported, in fair agreement with a first-principles theoretical prediction.

TL;DR: It is demonstrated that the Fermi energy of naturally electron-doped Bi2Se3 can be tuned by 1% Mg doping in order to realize the quantum topological transport.

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: It is demonstrated that a metallic surface-state band with a dominant Pb 6p character exhibits a large Rashba spin splitting of 200 meV and an effective mass of 0.028 me at the Fermi level, which provides a material basis for the novel field of spin transport/accumulation on semiconductor surfaces.