Excitons in atomically thin black phosphorus

Abstract

Raman scattering and photoluminescence spectroscopy are used to investigate the optical properties of single layer black phosphorus obtained by mechanical exfoliation of bulk crystals under an argon atmosphere. The Raman spectroscopy, performed in situ on the same flake as the photoluminescence measurements, demonstrates the single layer character of the investigated samples. The emission spectra, dominated by excitonic effects, display the expected in plane anisotropy. The emission energy depends on the type of substrate on which the flake is placed due to the different dielectric screening. Finally, the blue shift of the emission with increasing temperature is well described using a two oscillator model for the temperature dependence of the band gap.

6 pages, 4 figures

References in corpus (15)

• The Raman Fingerprint of Graphene
• Black phosphorus field-effect transistors
• Phosphorene: A New 2D Material with High Carrier Mobility
• Anomalous Lattice Vibrations of Single and Few-Layer MoS2
• High-mobility transport anisotropy and linear dichroism in few-layer black phosphorus
• Rediscovering Black Phosphorus: A Unique Anisotropic 2D Material for Optoelectronics and Electronics
• Tunable Band Gap and Anisotropic Optical Response in Few-layer Black Phosphorus
• Fast and broadband photoresponse of few-layer black phosphorus field-effect transistors
• Isolation and characterization of few-layer black phosphorus
• The Renaissance of Black Phosphorus
• Electric field effect in ultrathin black phosphorus
• Tunable optical properties of multilayers black phosphorus thin films
• Plasma-assisted fabrication of monolayer phosphorene and its Raman characterization
• Electrons and holes in phosphorene
• Large Frequency Change with Thickness in Interlayer Breathing Mode - Significant Interlayer Interactions in Few Layer Black Phosphorus

Cited by in corpus (19)

• Anomalous temperature dependence of the band-gap in Black Phosphorus
• Field Effect Optoelectronic Modulation of Quantum-Confined Carriers in Black Phosphorus
• Strong many-body interactions in ultrathin anisotropic tin (II) monosulfide
• Inverse Funnel Effect of Excitons in Strained Black Phosphorus
• Anisotropic buckling of few-layer black phosphorus
• Many-body quantum Monte Carlo study of 2D materials: cohesion and band gap in single-layer phosphorene
• Second-Order Raman Scattering in Exfoliated Black Phosphorus
• Nano-imaging of the edge-dependent optical polarization anisotropy of black phosphorus
• Anisotropic effects in two-dimensional materials
• High temperature electron-hole superfluidity with strong anisotropic gaps in double phosphorene monolayers
• Excitons in bulk black phosphorus evidenced by photoluminescence at low temperature
• Surface buckling of phosphorene materials: determination, origin and influence on electronic structure
• Visible Out-of-plane Polarized Luminescence and Electronic Resonance from Black Phosphorus
• Observation of A${}_g^1$ Raman mode splitting in few layers black phosphorus encapsulated with hexagonal boron nitride
• Quantum well confinement and competitive radiative pathways in the luminescence of black phosphorus layers
• Hydrostatic pressure control of the spin-orbit proximity effect, spin relaxation, and thermoelectricity in a phosphorene-WSe${}_2$ heterostructure
• Proximity-enabled control of spin-orbit coupling in phosphorene symmetrically and asymmetrically encapsulated by WSe${}_2$ monolayers
• Onset of exciton-exciton annihilation in single layer black phosphorus
• Straightforward Method to Orient Black Phosphorus from Bulk to Thin Layers using a Standard Green Laser