Layer-Controlled Intermolecular Coupling and Many-Body Effects in C60 Films
Abstract
Crystalline C60 is a molecular solid whose electronic properties emerge from the interplay of intermolecular hopping, electron correlations, and electron-vibration coupling. Unlike moiracutee van der Waals heterostructures, where interaction strength is commonly tuned by twist angle, molecular materials offer a complementary route in which layer number, molecular orientation, and substrate registry provide experimentally accessible control parameters. Here we present a systematic thickness-dependent angle-resolved photoemission study of C60 films, spanning the monolayer to the bulk limit. The HOMO-derived band exhibits a non-monotonic evolution: the intermediate-thickness film shows larger bandwidth, reduced effective mass, and pronounced gap-like and sub-band features. The experimental trends, together with Holstein-model simulations, point to strengthened effective intermolecular electronic coupling and enhanced electron-phonon-induced spectral renormalization in the intermediate-thickness regime. These results identify a dimensional crossover in C60 films and establish layer number as an effective knob for engineering electronic structure and many-body interactions in molecular thin films.
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BibTeX
@misc{luo2026layercontrolled,
title = {{Layer-Controlled Intermolecular Coupling and Many-Body Effects in C$_60$ Films}},
author = {Hai-Lan Luo and Weitang Li and Luca Moreschini and Jonathan Denlinger and Zhigang Shuai and Claudia Ojeda-Aristizabal and Alessandra Lanzara},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.28583},
eprint = {2608.28583},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.28583},
}
RIS
TY - UNPB
TI - Layer-Controlled Intermolecular Coupling and Many-Body Effects in C_60 Films
AU - Hai-Lan Luo
AU - Weitang Li
AU - Luca Moreschini
AU - Jonathan Denlinger
AU - Zhigang Shuai
AU - Claudia Ojeda-Aristizabal
AU - Alessandra Lanzara
PY - 2026
DA - 2026/08/28
PB - arXiv
DO - 10.48550/arxiv.2608.28583
UR - https://arxiv.org/abs/2608.28583
AB - Crystalline C_60 is a molecular solid whose electronic properties emerge from the interplay of intermolecular hopping, electron correlations, and electron-vibration coupling. Unlike moiracutee van der Waals heterostructures, where interaction strength is commonly tuned by twist angle, molecular materials offer a complementary route in which layer number, molecular orientation, and substrate registry provide experimentally accessible control parameters. Here we present a systematic thickness-dependent angle-resolved photoemission study of C_60 films, spanning the monolayer to the bulk limit. The HOMO-derived band exhibits a non-monotonic evolution: the intermediate-thickness film shows larger bandwidth, reduced effective mass, and pronounced gap-like and sub-band features. The experimental trends, together with Holstein-model simulations, point to strengthened effective intermolecular electronic coupling and enhanced electron-phonon-induced spectral renormalization in the intermediate-thickness regime. These results identify a dimensional crossover in C_60 films and establish layer number as an effective knob for engineering electronic structure and many-body interactions in molecular thin films.
ER -