Kenji Watanabe

TL;DR: It is experimentally demonstrated that the electronic structure of few-layer phosphorene varies significantly with the number of layers, in good agreement with theoretical predictions, and the interband optical transitions cover a wide, technologically important spectral range.

TL;DR: In this article, a microsecond-long-lived valley polarization in 2D transition metal dichalcogenides (TMD) was achieved by exploiting the ultrafast charge transfer processes in the heterostructure that efficiently creates resident holes in the WSe2 layer.

TL;DR: In this article, an experimental and theoretical study of two intrinsic TMD superconductors with large spin-orbit coupling in the atomic layer limit is presented, and it is shown that the enhancement of the upper critical field is sustained by the dominance of spinorbit coupling over weak interlayer coupling, providing additional platforms for unconventional superconducting states in two dimensions.

TL;DR: The superconducting properties as the material is reduced to monolayer thickness are investigated and high-field measurements point to the largest upper critical field thus reported for an intrinsic TMD superconductor, 2H-TaS2 and2H-NbSe2.

TL;DR: In this paper, a low-temperature photoluminescence spectroscopy was employed to identify the biexciton state in BN-encapsulated single-layer WSe2.