312 citations · 1k across the 19 of their papers we have counts for
13 papers · 1 filter
The key role of non-local screening in the environment-insensitive exciton fine structures of transition-metal dichalcogenide monolayers
Wei-Hua Li, Jhen-Dong Lin, Ping-Yuan Lo +4
In this work, we present a comprehensive theoretical and computational investigation of exciton fine structures of WSe-monolayers, one of the best known two-dimensional (2D) tr…
P-type Ohmic contact to monolayer WSe2 field-effect transistors using high electron affinity amorphous MoO3
Yi-Hsun Chen, Kaijian Xing, Song Liu +10
1 School of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia 2 Australian Research Council Centre of Excellence in Future Low-Energy Electronics Technolo…
Long-lived populations of momentum- and spin-indirect excitons in monolayer WSe
Shao-Yu Chen, Maciej Pieczarka, Matthias Wurdack +6
Monolayer transition metal dichalcogenides are a promising platform to investigate many-body interactions of excitonic complexes. In monolayer tungsten diselenide, the ground-state…
Ground and Excited Exciton Polarons in Monolayer MoSe2
Thomas Goldstein, Yueh-Chun Wu, Shao-Yu Chen +4
Monolayer transition metal dichalcogenide semiconductors, with versatile experimentally accessible exciton species, offer an interesting platform for investigating the interaction…
Oxidized-monolayer Tunneling Barrier for Strong Fermi-level Depinning in Layered InSe Transistors
Yi-Hsun Chen, Chih-Yi Cheng, Shao-Yu Chen +9
In 2D-semiconductor-based field-effect transistors and optoelectronic devices, metal-semiconductor junctions are one of the crucial factors determining device performance. The Ferm…
Luminescent emission of excited Rydberg excitons from monolayer WSe2
Shao-Yu Chen, Zhengguang Lu, Thomas Goldstein +11
We report the experimental observation of radiative recombination from Rydberg excitons in a two-dimensional semiconductor, monolayer WSe2, encapsulated in hexagonal boron nitride.…
Coulomb-bound four- and five-particle valleytronic states in an atomically-thin semiconductor
Shao-Yu Chen, Thomas Goldstein, Takashi Taniguchi +2
As hosts for tightly-bound electron-hole pairs carrying quantized angular momentum, atomically-thin semiconductors of transition metal dichalcogenides provide an appealing platform…
Superior valley polarization and coherence of 2s excitons in monolayer WSe2
Shao-Yu Chen, Thomas Goldstein, Jiayue Tong +3
We report experimental observation of 2s exciton radiative emission from monolayer tungsten diselenide, enabled by hexagonal boron nitride protected high-quality samples. The 2s lu…
Activation of new Raman modes by inversion symmetry breaking in type II Weyl semimetal candidate T'-MoTe2
Shao-Yu Chen, Thomas Goldstein, Dhandapani Venkataraman +2
We synthesized distorted octahedral(T') molybdenum ditelluride (MoTe2) and investigated its vibrational properties with Raman spectroscopy, density functional theory and symmetry a…
Inversion-symmetry-breaking-activated shear Raman bands in -MoTe
Shao-Yu Chen, Thomas Goldstein, Ashwin Ramasubramaniam +1
Type-II Weyl fermion nodes, located at the touching points between electron and hole pockets, have been recently predicted to occur in distorted octahedral () transition metal…
Demonstration of distinct semiconducting transport characteristics of monolayer graphene functionalized via plasma activation of substrate surfaces
Po-Hsiang Wang, Fu-Yu Shih, Shao-Yu Chen +7
We report semiconducting behavior of monolayer graphene enabled through plasma activation of substrate surfaces. The graphene devices are fabricated by mechanical exfoliation onto…
Extrinsic Origin of Persistent Photoconductivity in Monolayer MoS2 Field Effect Transistors
Yueh-Chun Wu, Cheng-Hua Liu, Shao-Yu Chen +5
Recent discoveries of the photoresponse of molybdenum disulfide (MoS2) have shown the considerable potential of these two-dimensional transition metal dichalcogenides for optoelect…
Helicity resolved Raman scattering of MoS2, MoSe2, WS2 and WSe2 atomic layers
Shao-Yu Chen, Changxi Zheng, Michael S. Fuhrer +1
The two-fold valley degeneracy in two-dimensional (2D) semiconducting transition metal dichalcogenides (TMDCs) (Mo,W)(S,Se)2 is suitable for "valleytronics", the storage and manupu…