2.6k citations · 3.2k across the 14 of their papers we have counts for
14 papers
Strain-Tunable Opto-electronics in PdS Monolayer: the Role of Band Nesting and Carrier-Phonon Scattering
Hongfa Wang, Yancheng Gong, Subrahmanyam Pattamatta +3
Strain engineering is a powerful strategy for tuning the optoelectronic properties in two-dimensional materials, yet the underlying mechanisms governing their strain response are o…
Strain-Enabled Giant Second-Order Susceptibility in Monolayer WSe
Zhizi Guan, Yunkun Xu, Junwen Li +3
Monolayer WSe (ML WSe) exhibits a high second-harmonic generation (SHG) efficiency under single 1-photon (1-p) or 2-photon (2-p) resonant excitation conditions due to enhan…
Unconventional spin-orbit torque in transition metal dichalcogenide/ferromagnet bilayers from first-principles calculations
Fei Xue, Christoph Rohmann, Junwen Li +2
Motivated by recent observations of unconventional out-of-plane dampinglike torque in \ch{WTe2}/Permalloy bilayer systems, we calculate the spin-orbit torque generated in two-dimen…
Intrinsic spin currents in ferromagnets
V. P. Amin, Junwen Li, M. D. Stiles +1
First principles calculations show that electric fields applied to ferromagnets generate spin currents flowing perpendicularly to the electric field. Reduced symmetry in these ferr…
Optical spin transfer and spin-orbit torques in thin film ferromagnets
Junwen Li, Paul M. Haney
We study the optically induced torques in thin film ferromagnetic layers under excitation by circularly polarized light. We study cases both with and without Rashba spin-orbit coup…
Circular Photogalvanic Effect in Organometal Halide Perovskite CHNHPbI
Junwen Li, Paul M. Haney
We study the circular photogalvanic effect in the organometal halide perovskite solar cell absorber CHNHPbI. For crystal structures which lack inversion symmetry, the c…
Interfacial magnetic anisotropy from a 3-dimensional Rashba substrate
Junwen Li, Paul M. Haney
We study the magnetic anisotropy which arises at the interface between a thin film ferromagnet and a 3-d Rashba material. The 3-d Rashba material is characterized by the spin-orbit…
Optical Spintronics in Organic-Inorganic Perovskite Photovoltaics
Junwen Li, Paul M. Haney
Organic-inorganic halide CHNHPbI solar cells have attracted enormous attention in recent years due to their remarkable power conversion efficiency. When inversion symme…
MXenes as High Capacity Electrode Materials for Metal (Li, Na, K, Ca)-ion batteries
Dequan Er, Junwen Li, Michael Naguib +3
Two-dimensional (2D) materials can have an excellent capability to handle high rates of charge in ion batteries since metal ions need not diffuse in a 3D lattice structure. However…
Defective graphene as promising anode material for Na-ion battery and Ca-ion battery
Dibakar Datta, Junwen Li, Vivek B. Shenoy
We have investigated adsorption of Na and Ca on graphene with divacancy (DV) and Stone-Wales (SW) defect. Our results show that adsorption is not possible on pristine graphene. How…
The Equilibrium Shape of Graphene Domains on Ni(111)
Meifang Li, J. B. Hannon, R. M. Tromp +4
We have determined the equilibrium shape of graphene domains grown on Ni(111) via carbon segregation at 925°C. In situ, spatially-resolved electron diffraction measurements were us…
Bonding Charge Density and Ultimate Strength of Monolayer Transition Metal Dichalcogenides
Junwen Li, Nikhil V. Medhekar, Vivek B. Shenoy
Two-dimensional (2D) semiconducting transition metal dichalcogenides (TMDs) can withstand a large deformation without fracture or inelastic relaxation, making them attractive for a…
Enhanced Catalytic Activity in Strained Chemically Exfoliated WS2 Nanosheets for Hydrogen Evolution
Damien Voiry, Hisato Yamaguchi, Junwen Li +8
The ability to efficiently evolve hydrogen via electrocatalysis at low overpotentials holds tremendous promise for clean energy. Hydrogen evolution reaction (HER) can be easily ach…
Graphene quantum dots embedded in hexagonal boron nitride sheets
Junwen Li, Vivek B. Shenoy
We have carried out first-principles calculations on electronic properties of graphene quantum dots embedded in hexagonal boron nitride monolayer sheets. The calculations with dens…