Electronegative ligands enhance charge transfer to Mn12 single-molecule magnets deposited on graphene

Zhu, Xiaochen; Hale, Ashlyn; Christou, George; Hebard, Arthur F.

doi:10.1063/1.5128329

Electronegative ligands enhance charge transfer to Mn₁₂ single-molecule magnets deposited on graphene

Journal Article · Tue Feb 11 23:00:00 EST 2020 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.5128329· OSTI ID:1601768

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Univ. of Florida, Gainesville, FL (United States); University of Florida, Gainesville, FL (United States)
Univ. of Florida, Gainesville, FL (United States)

Combining single-molecule magnets (SMMs) and emergent two-dimensional substrates such as graphene may lead to device configurations that are promising for spintronics and quantum computing. Yet, to fully consider the unique features of SMMs anchored to two-dimensional substrates, the choice of ligand attachments, which could affect the magnetic and electronic properties, is critical. In this work, we focus on hybrid junctions comprising CVD-grown graphene and [Mn $_{12}$ O $_{12}$ (O $_{2}$ CR) $_{16}$ (H $_{2}$ O) $_{4}$ ]( $R = {CH}_{3}, {CHCl}_{2}$ ) SMMs with different ligands. We find that [Mn $_{12}$ O $_{12}$ (O $_{2}$ CCH $_{3}$ ) $_{16}$ (H $_{2}$ O) $_{4}$ ] SMMs barely change the graphene’s conductivity, while [Mn $_{12}$ O $_{12}$ (O $_{2}$ CCHCl $_{2}$ ) $_{16}$ (H $_{2}$ O) $_{4}$ ] SMMs with more electronegative ligands, by means of charge transfer, remarkably modify the electronic transport in graphene as revealed by gate-voltage dependent magnetotransport measurements.

View Accepted Manuscript (DOE)

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Molecular Magnetic Quantum Materials (M2QM); Univ. of Florida, Gainesville, FL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0019330

OSTI ID:: 1601768

Alternate ID(s):: OSTI ID: 1599260

Journal Information:: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 6 Vol. 127; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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