Vibrational excitation mechanism in tunneling spectroscopy beyond the Franck-Condon model

Abstract

Vibronic spectra of molecules are typically described within the Franck-Condon model. Here, we show that highly resolved vibronic spectra of large organic molecules on a single layer of MoS${}_2$ on Au(111) show spatial variations in their intensities, which cannot be captured within this picture. We explain that vibrationally mediated perturbations of the molecular wave functions need to be included into the Franck-Condon model. Our simple model calculations reproduce the experimental spectra at arbitrary position of the STM tip over the molecule in great detail.

References in corpus (3)

• Giant Phonon-induced Conductance in Scanning Tunneling Spectroscopy of Gate-tunable Graphene
• Phonon mediated tunneling into graphene
• Dynamic Jahn-Teller effect in electron transport through single C60 molecules

Cited by in corpus (9)

• Moiré tuning of spin excitations: Individual Fe atoms on MoS${}_2$/Au(111)
• Monolayers of MoS${}_2$ on Ag(111) as decoupling layers for organic molecules: resolution of electronic and vibronic states of TCNQ
• Spin-orbit interaction induces charge beatings in a lightwave-STM single molecule junction
• Systematic Modulation of Charge and Spin in Graphene Nanoribbons on MgO
• Resolution of intramolecular dipoles and push-back effect of individual molecules on a metal surface
• Variations of vibronic states in densely-packed structures of molecules with intramolecular dipoles
• Interpreting tunneling spectroscopic maps of a dinuclear Co(II) complex on gold
• Electronic Properties of Tetraazaperopyrene Derivatives on Au(111): Energy Level Alignment and Interfacial Band Formation
• Evidence for atomic-scale vibron-mediated electron bunching