Publications (6)
New Mechanism for Strongly Bound Excitons in Gapless Two-Dimensional Structures
Yufeng Liang, Ryan Soklaski, Shouting Huang +4
Common wisdom asserts that bound excitons cannot form in high-dimensional (d>1) metallic structures because of their overwhelming screening and unavoidable resonance with nearby co…
Quasiparticle band-edge energy and band offsets of monolayer of molybdenum and tungsten chalcogenide
Yufeng Liang, Shouting Huang, Ryan Soklaski +1
We report the quasiparticle energy of monolayer of molybdenum and tungsten dichalcogenides, MX2 (M=Mo, W; X=S, Se, Te). Beyond calculating bandgaps, we have achieved converged abso…
Lattice Vibrational Modes in Si/Ge Core-shell Nanowires
Shouting Huang, Li Yang
We present a first-principles study on lattice vibrational modes of Si/Ge core-shell nanowires (NWs). In addition to quantum confinement, the internal strain induced by the lattice…
Exciton Energy Spectra in Two-Dimensional Graphene Derivatives
Shouting Huang, Yufeng Liang, Li Yang
The energy spectra and wavefunctions of bound excitons in important two-dimensional (2D) graphene derivatives, i.e., graphyne and graphane, are found to be strongly modified by qua…
Many-Electron Effects on Optical Absorption Spectra of Strained Graphene
Yufeng Liang, Shouting Huang, Li Yang
We employ the first-principles GW+Bethe Salpeter equation approach to study the electronic structure and optical absorption spectra of uniaxial strained graphene with many-electron…
Electronic Structure and Quasiparticle Band Gap of Silicene Structures
Shouting Huang, Wei Kang, Li Yang
We report first-principles results on the electronic structure of various silicene structures. For planar and simply buckled silicenes, we confirm their zero-gap nature and show a…