Proving weak electronic interaction between molecules and substrate: a study of pentacene monolayer on graphite

Yuri Hasegawa; Takuma Yamaguchi; Matthias Meissner; Takahiro Ueba; Fabio Bossolotti; Shin-ichiro Ideta; Kiyohisa Tanaka; Susumu Yanagisawa; Satoshi Kera

arXiv · 2304.14734

Proving weak electronic interaction between molecules and substrate: a study of pentacene monolayer on graphite

Yuri Hasegawa·Takuma Yamaguchi·Matthias Meissner·Takahiro Ueba·Fabio Bossolotti·Shin-ichiro Ideta·Kiyohisa Tanaka·Susumu Yanagisawa·Satoshi Kera

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Abstract

The impact of van der Waals interaction on the electronic structure between a pentacene monolayer and a graphite surface was investigated. Upon cooling the monolayer, newly formed dispersive bands, showing the constant final state nature overlapping with the non-dispersive, discrete molecular orbital state, is observed by low-energy angle-resolved photoelectron spectroscopy. The dispersive band consists of positive and negative intensities depending on the final state energy, indicating Fano resonance involving a discrete molecular state that couples a continuum state upon photoionization. A wave-function overlap is demonstrated according to their larger spread in unoccupied states even at the weakly bounded interface by Fano spectral analysis.

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Yuri Hasegawa, Takuma Yamaguchi, Matthias Meissner, Takahiro Ueba, Fabio Bossolotti, Shin-ichiro Ideta, Kiyohisa Tanaka, Susumu Yanagisawa, Satoshi Kera. 2023-04-28. Proving weak electronic interaction between molecules and substrate: a study of pentacene monolayer on graphite. https://arxiv.org/abs/2304.14734

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