Two-Dimensional Valley Electrons and Excitons in Noncentrosymmetric 3R MoS${}_2$

Ryosuke Akashi, Masayuki Ochi, Sándor Bordács +4

We find that the motion of the valley electrons -- electronic states close to the $\mathrm{K}$ and ${\mathrm{K}}^{\prime }$ points of the Brillouin zone -- is confined into two dimension when the l…