Electric Field Controlled Magnetic Anisotropy in a Single Molecule
Alexander S. Zyazin, Johan W.G. van den Berg, Edgar A. Osorio, Herre, S.J. van der Zant, Nikolaos P. Konstantinidis, Martin Leijnse, Maarten R., Wegewijs, Falk May, Walter Hofstetter, Chiara Danieli, Andrea Cornia
TL;DR
This study demonstrates that the magnetic anisotropy of a single Fe4 molecule can be electrically controlled via gate voltage, enabling reversible tuning of its magnetic properties in a three-terminal device.
Contribution
It provides experimental evidence that magnetic anisotropy in a single-molecule magnet can be modulated electrically, advancing molecular spintronics.
Findings
Magnetic anisotropy is enhanced by electron addition/subtraction.
Magnetic properties are retained after charge state changes.
Electric control of single-molecule magnetism is achievable.
Abstract
We have measured quantum transport through an individual Fe single-molecule magnet embedded in a three-terminal device geometry. The characteristic zero-field splittings of adjacent charge states and their magnetic field evolution are observed in inelastic tunneling spectroscopy. We demonstrate that the molecule retains its magnetic properties, and moreover, that the magnetic anisotropy is significantly enhanced by reversible electron addition / subtraction controlled with the gate voltage. Single-molecule magnetism can thus be electrically controlled.
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