187 citations · 800 across the 20 of their papers we have counts for
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Intervalley electron-hole exchange interaction and impurity-assisted recombination of indirect excitons in WS and WSe monolayers
Pengke Li, Cedric Robert, Dinh Van Tuan +3
The variety of excitonic states in tungsten-based dichalcogenide monolayers stems from unique interplay between the spin and valley degrees of freedom. One of the exciton species i…
Mid-infrared photoconductivity spectra of single tellurium nanowires]{Mid-infrared photoconductivity spectra of single tellurium nanowires
Pengke Li
Due to its low bandgap and high optical efficiency, tellurium is considered an important material candidate for mid-infrared applications. Taking advantage of its structural anisot…
Excitons without effective mass: biased bilayer graphene
Pengke Li, Ian Appelbaum
Understanding the dynamics of excitons in two dimensional semiconductors requires a theory that incorporates the essential physics distinct from their three-dimensional counterpart…
Robust zero-energy bound states in a helical lattice
Pengke Li, Jay D. Sau, Ian Appelbaum
Atomic-scale helices exist as motifs for several material lattices. We examine a tight-binding model for a single one-dimensional monatomic chain with a p-orbital basis coiled into…
Intrinsic two-dimensional state on the pristine surface of tellurium
Pengke Li, Ian Appelbaum
Using a tight-binding description, we show how the zero-dimensional state bound to the edge of a single one-dimensional helical chain of tellurium atoms evolves into two-dimensiona…
Spin polarization control in a 2-dimensional semiconductor
Ian Appelbaum, Pengke Li
Long carrier spin lifetimes are a double-edged sword for the prospect of constructing "spintronic" logic devices: Preservation of the logic variable within the transport channel or…
Self-consistent model of spin accumulation magnetoresistance in ferromagnet-insulator-semiconductor tunnel junctions
Ian Appelbaum, Holly N. Tinkey, Pengke Li
Spin accumulation in a paramagnetic semiconductor due to voltage-biased current tunneling from a polarized ferromagnet is experimentally manifest as a small additional spin-depende…