| Autor: |
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, Hyunyong Choi, Jonghwan Kim, Si-Young Choi, Moon-Ho Jo |
| Rok vydání: |
2021 |
| Popis: |
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 two-dimensional (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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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