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Quantitative determination of interlayer electronic coupling at various critical points in bilayer MoS2
Wei-Ting Hsu, Jiamin Quan, Chi-Ruei Pan +7
Tailoring interlayer coupling has emerged as a powerful tool to tune the electronic structure of van der Waals (vdW) bilayers. One example is the usage of the moire pattern to crea…
Confined monolayer Ag as a large gap 2D semiconductor and its momentum resolved excited states
Woojoo Lee, Yuanxi Wang, Wei Qin +11
2D materials have intriguing quantum phenomena that are distinctively different from their bulk counterparts. Recently, epitaxially synthesized wafer-scale 2D metals, composed of e…
Directly visualizing the momentum forbidden dark excitons and their dynamics in atomically thin semiconductors
Julien Madéo, Michael K. L. Man, Chakradhar Sahoo +11
Resolving the momentum degree of freedom of excitons - electron-hole pairs bound by the Coulomb attraction in a photoexcited semiconductor, has remained a largely elusive goal for…
Energy-resolved Photoconductivity Mapping in a Monolayer-bilayer WSe2 Lateral Heterostructure
Zhaodong Chu, Ali Han, Chao Lei +10
Vertical and lateral heterostructures of van der Waals materials provide tremendous flexibility for band structure engineering. Since electronic bands are sensitively affected by d…
Single Crystalline Silver Films for Plasmonics: From Monolayer to Optically Thick Film
Fei Cheng, Chien-Ju Lee, Junho Choi +7
Epitaxial growth of single crystalline noble metals on dielectric substrates has received tremendous attention recently due to their technological potentials as low loss plasmonic…
Biexciton fine structure in monolayer transition metal dichalcogenides
Alexander Steinhoff, Matthias Florian, Akshay Singh +8
The optical properties of atomically thin transition metal dichalcogenide (TMDC) semiconductors are shaped by the emergence of correlated many-body complexes due to strong Coulomb…
Tailoring Semiconductor Lateral Multi-junctions for Giant Photoconductivity Enhancement
Yutsung Tsai, Zhaodong Chu, Yimo Han +9
Semiconductor heterostructures have played a critical role as the enabler for new science and technology. The emergence of transition metal dichalcogenides (TMDs) as atomically thi…
Disorder Dependent Valley Properties in Monolayer WSe2
Kha Tran, Akshay Singh, Joe Seifert +7
We investigate the effect on disorder potential on exciton valley polarization and valley coherence in monolayer WSe2. By analyzing polarization properties of photoluminescence, th…
Impact of Grain Boundaries on Efficiency and Stability of Organic-Inorganic Trihalide Perovskites
Zhaodong Chu, Mengjin Yang, Philip Schulz +7
Organic-inorganic perovskite solar cells have attracted tremendous attention because of their remarkably high power conversion efficiencies (PCEs). To further improve the device pe…