Journal Article

FZJ-2026-03865

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Molecular Order Induced Charge Transfer in a C 60 -Topological Insulator Moiré Heterostructure

Pandeya, R. P. (Corresponding author) ; Shchukin, K. P. ; Falke, Y. ; Mussler, G.FZJ* ; Jalil, A. R.FZJ* ; Atodiresei, N.FZJ* ; Hasdeo, E. H. ; Fedorov, A. ; Senkovskiy, B. V. ; Jansen, D. ; Di Santo, G. ; Petaccia, L. ; Grüneis, A. (Corresponding author)

2025
ACS Publ. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.nanolett.4c06294  doi:10.34734/FZJ-2026-03865

Abstract: We synthesized and spectroscopically investigated monolayer (ML) C60 on the topological insulator (TI) Bi4Te3. This C60/Bi4Te3 heterostructure is characterized by an excellent translational order in a novel (4 × 4) C60 superstructure on a (9 × 9) cell of Bi4Te3. Angle-resolved photoemission spectroscopy (ARPES) of C60/Bi4Te3 reveals that ML C60 accepts electrons from the TI at room temperature, but no charge transfer occurs at low temperatures. This temperature-dependent doping is further investigated by Raman spectroscopy, photoluminescence (PL), and calculations of C60/Bi4Te3. At low temperatures, Raman spectroscopy and PL show a dramatic intensity increase of the C60-related signal, suggesting a transition to a rotationally ordered state. Calculations explain the charge transfer by C60 adsorption to Bi4Te3 surface defects. The temperature dependence of the charge transfer is attributed to the orientational order of C60. The electron affinity of C60 increases at low temperatures due to the freezing of the rotational motion.

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Contributing Institute(s):

1. Halbleiter-Nanoelektronik (PGI-9)
2. Quanten-Theorie der Materialien (PGI-1)

Research Program(s):

1. 5222 - Exploratory Qubits (POF4-522) (POF4-522)

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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