Heteroepitaxial van der Waals semiconductor superlattices [post]

Gangtae Jin, Chang-Soo Lee, Odongo Francis Okello, Suk-Ho Lee, Min Yeong Park, Soonyoung Cha, Seung-Young Seo, Gunho Moon, Dong-Hwan Yang, Cheolhee Han, Hyungju Ahn, Jekwan Lee (+4 others)
2021 unpublished
We report atomic layer-by-layer epitaxial growth of van der Waals (vdW) semiconductor superlattices (SLs) with programmable stacking periodicities, composed of more than two kinds of dissimilar transition-metal dichalcogenide monolayers (MLs), such as MoS2, WS2 and WSe2. The kinetics-controlled vdW epitaxy in the near equilibrium limit by metalorganic chemical vapour depositions enables to achieve accurate ML-by-ML stacking, free of interlayer atomic mixing, resulting in the tunable
more » ... nal (2D) vdW electronic systems. We identified coherent atomic stacking orders at the vdW heterointerfaces, and present scaling valley polarized optical excitations that only pertain to a series of 2D type II band alignments.
doi:10.21203/rs.3.rs-193065/v1 fatcat:ocegwqc6pvgcxdklj4brnwfgbe