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Exciton mapping at subwavelength scales in two-dimensional materials
Luiz H. G. Tizei, Yung-Chang Lin, Masaki Mukai +5
Spatially resolved EELS has been performed at diffuse interfaces between MoS and MoSe single layers. With a monochromated electron source (20 meV) we have successfully prob…
Tailoring excitonic states of van der Waals bilayers through stacking configuration, band alignment and valley-spin
Wei-Ting Hsu, Bo-Han Lin, Li-Syuan Lu +6
Excitons in monolayer semiconductors have large optical transition dipole for strong coupling with light field. Interlayer excitons in heterobilayers, with layer separation of elec…
Momentum Conserved Ultrafast Charge Transfer Dynamics of Interlayer Excitons in vdW Heterostructures
Pranjal Kumar Gogoi, Yung-Chang Lin, Ryosuke Senga +9
Heterostructures comprising van der Waals (vdW) stacked transition metal dichalcogenide (TMDC) monolayers are a fascinating class of two-dimensional (2D) materials with unique prop…
Strong Rashba-Edelstein Effect-Induced Spin-Orbit Torques in Monolayer Transition-Metal Dichalcogenide/Ferromagnet Bilayers
Qiming Shao, Guoqiang Yu, Yann-Wen Lan +7
The electronic and optoelectronic properties of two dimensional materials have been extensively explored in graphene and layered transition metal dichalcogenides (TMDs). Spintronic…
Oxygen passivation mediated tunability of trion and excitons in MoS
Pranjal Kumar Gogoi, Zhenliang Hu, Qixing Wang +10
Using wide spectral range in situ spectroscopic ellipsometry with systematic ultra high vacuum annealing and in situ exposure to oxygen, we report the complex dielectric function o…
Direct Measurement of Exciton Valley Coherence in Monolayer WSe
Kai Hao, Galan Moody, Fengcheng Wu +7
In crystals, energy band extrema in momentum space can be identified by their valley index. The internal quantum degree of freedom associated with valley pseudospin indices can act…