2025-08-28 分子科学研究所
＜関連情報＞
- https://www.ims.ac.jp/news/2025/08/0828.html
- https://journals.aps.org/prb/abstract/10.1103/2k7h-h8jm
ファンデルワールス界面における弱い電子相互作用の指紋解析：グラファイト上のペンタセン単分子層におけるファノ効果の痕跡 Fingerprinting weak electronic interaction at a van der Waals interface: Fano signatures in a pentacene monolayer on graphite
Yuri Hasegawa, Takuma Yamaguchi, Matthias Meissner, Takahiro Ueba, Fabio Bussolotti, Shin-ichiro Ideta, Kiyohisa Tanaka,, Susumu Yanagisawa, and Satoshi Kera
Physical Review B Published: 1 August, 2025
DOI: https://doi.org/10.1103/2k7h-h8jm
Abstract
We investigated the influence of van der Waals interactions on the electronic structure at the interface between a pentacene monolayer and a graphite surface. Upon cooling below 130 K, the pentacene molecules form a densely packed monolayer characterized by newly developed dispersive bands. These bands, observed using low-energy angle-resolved photoelectron spectroscopy with photon energy varying from 7.2 to 8.5 eV, exhibit constant final-state characteristics that overlap with nondispersive molecular-orbital states. This overlap results in variations in photoemission intensity—both enhancement and suppressions—indicative of Fano resonance. Such resonance arises from the interaction between a discrete molecular state and a continuum state. The Fano profile analysis of spectral fine features reveals the wave-function connection by the broader spread in unoccupied states at the physisorbed interface.
