4.1k citations · 9.3k across the 7 of their papers we have counts for
7 papers
Characterization and control of ZnGeN2 cation lattice ordering
Eric W. Blanton, Keliang He, Jie Shan +1
ZnGeN2 and other heterovalent ternary semiconductors have important potential applications in optoelectronics, but ordering of the cation sublattice, which can affect the band gap,…
Raman study of the vibrational modes in ZnGeN2 (0001)
Eric W. Blanton, Mark Hagemann, Keliang He +3
A Raman spectroscopy study was carried out for ZnGeN2 with direction of propagation along the (0001) crystallographic direction on hexagonal single crystal platelets obtained by re…
Tightly bound excitons in monolayer WSe2
Keliang He, Nardeep Kumar, Liang Zhao +4
Exciton binding energy and excited states in monolayers of tungsten diselenide (WSe2) are investigated using the combined linear absorption and two-photon photoluminescence excitat…
Tuning many-body interactions in graphene: The effects of doping on excitons and carrier lifetimes
Kin Fai Mak, Felipe H. da Jornada, Keliang He +6
The optical properties of graphene are strongly affected by electron-electron (e-e) and electron-hole (e-h) interactions. Here we tune these many-body interactions through varying…
Experimental demonstration of continuous electronic structure tuning via strain in atomically thin MoS2
Keliang He, Charles Poole, Kin Fai Mak +1
We demonstrate the continuous tuning of the electronic structure of atomically thin MoS2 on flexible substrates by applying a uniaxial tensile strain. A redshift at a rate of ~70 m…
Observation of tightly bound trions in monolayer MoS2
Kin Fai Mak, Keliang He, Changgu Lee +4
Two-dimensional (2D) atomic crystals, such as graphene and transition-metal dichalcogenides, have emerged as a new class of materials with remarkable physical properties. In contra…
Control of valley polarization in monolayer MoS2 by optical helicity
Kin Fai Mak, Keliang He, Jie Shan +1
Electronic and spintronic devices rely on the fact that free charge carriers in solids carry electric charge and spin, respectively. There are, however, other properties of charge…