Orbital character effects in the photon energy and polarization dependence of pure C60 photoemission

Abstract

Recent direct experimental observation of multiple highly-dispersive C${}_{60}$ valence bands has allowed for a detailed analysis of the unique photoemission traits of these features through photon energy- and polarization-dependent measurements. Previously obscured dispersions and strong photoemission traits are now revealed by specific light polarizations. The observed intensity effects prove the locking in place of the C${}_{60}$ molecules at low temperatures and the existence of an orientational order imposed by the substrate chosen. Most importantly, photon energy- and polarization-dependent effects are shown to be intimately linked with the orbital character of the C${}_{60}$ band manifolds which allows for a more precise determination of the orbital character within the HOMO-2. Our observations and analysis provide important considerations for the connection between molecular and crystalline C${}_{60}$ electronic structure, past and future band structure studies, and for increasingly popular C${}_{60}$ electronic device applications, especially those making use of heterostructures.

References in corpus (10)

• Monolayer MoS2: trigonal warping, "Γ-valley", and spin-orbit coupling effects
• C${}_{60}$ in Reflection Nebulae
• A precise method for visualizing dispersive features in image plots
• Effective lattice Hamiltonian for monolayer MoS2 : Tailoring electronic structure with perpendicular electric and magnetic fields
• Reversal of the circular dichroism in the angle-resolved photoemission from Bi2Te3
• Low energy excitations in graphite: The role of dimensionality and lattice defects
• Orbital Characters Determined from Fermi Surface Intensity Patterns using Angle-Resolved Photoemission Spectroscopy
• Orbital character variation of the Fermi surface and doping dependent changes of the dimensionality in BaFe2-xCoxAs2 from angle-resolved photoemission spectroscopy
• Oscillatory surface dichroism of an insulating topological insulator Bi2Te2Se
• Observation of highly dispersive bands in pure thin film C${}_{60}$

Cited by in corpus (3)

• Evidence for Band Renormalizations in Strong-coupling Superconducting Alkali-fulleride Films
• Polarization dependent photoemission as a probe of the magnetic ground state in the layered ferromagnet VI3
• First principles study of the vibronic coupling in positively charged C${}_{60}^{+}$