Carrier Plasmon Induced Nonlinear Band Gap Renormalization in Two-Dimensional Semiconductors

Abstract

In reduced-dimensional semiconductors, doping-induced carrier plasmons can strongly couple with quasiparticle excitations, leading to a significant band gap renormalization. We develop a new plasmon-pole theory that efficiently and accurately capture this coupling. Using monolayer molybdenum disulfide (MoS2) as a prototype two-dimensional (2D) semiconductor, we reveal an enhanced band gap renormalization around 400 meV and an unusual nonlinear evolution of its band gap with doping. This 2D prediction significantly differs from the linear behaviors that are common to one-dimensional structures. Our developed approach allows for a quantitative understanding of many-body interactions in general doped 2D semiconductors and paves the way for novel band gap engineering techniques.

References in corpus (5)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Observation of giant bandgap renormalization and excitonic effects in a monolayer transition metal dichalcogenide semiconductor
• Excitonic Effects on the Optical Response of Graphene and Bilayer Graphene
• Truncation of Periodic Image Interactions for Confined Systems
• Velocity renormalization and anomalous quasiparticle dispersion in extrinsic graphene

Cited by in corpus (15)

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• Interlayer coupling and gate-tunable excitons in transition metal dichalcogenide heterostructures
• Renormalization of quasiparticle band gap in doped two-dimensional materials from many-body calculations
• Optically discriminating carrier-induced quasiparticle band gap and exciton energy renormalization in monolayer MoS2
• Band structures of plasmonic polarons
• Theory of electron-plasmon coupling in semiconductors
• Visualizing Orbital Content of Electronic Bands in Anisotropic 2D Semiconducting ReSe${}_2$
• Quasiparticle band-gap renormalization in doped monolayer MoS${}_2$
• Stark Effect of Doped Two-Dimensional Transition Metal Dichalcogenides
• Comprehensive tunneling spectroscopy of quasi-freestanding MoS${}_2$ on graphene on Ir(111)
• Microscopic mechanism of tunable band gap in potassium doped few-layer black phosphorus
• Phonon-assisted processes in the ultraviolet transient optical response of graphene
• Quasiparticle and Optical Properties of Carrier-Doped Monolayer MoTe${}_2$ from First Principles
• Electron-plasmon interaction induced plasmonic-polaron band replication in epitaxial perovskite SrIrO${}_3$ films
• Plasmon-Phonon Hybridization in Doped Semiconductors from First Principles