Electrical manipulation of spin states in a single electrostatically gated transition-metal complex - Condensed Matter > Mesoscale and Nanoscale PhysicsReport as inadecuate




Electrical manipulation of spin states in a single electrostatically gated transition-metal complex - Condensed Matter > Mesoscale and Nanoscale Physics - Download this document for free, or read online. Document in PDF available to download.

Abstract: We demonstrate an electrically controlled high-spin S=5-2 to low-spinS=1-2 transition in a three-terminal device incorporating a single Mn2+ ioncoordinated by two terpyridine ligands. By adjusting the gate-voltage we reducethe terpyridine moiety and thereby strengthen the ligand-field on the Mn-atom.Adding a single electron thus stabilizes the low-spin configuration and thecorresponding sequential tunnelling current is suppressed by spin-blockade.From low-temperature inelastic cotunneling spectroscopy, we infer themagnetic excitation spectrum of the molecule and uncover also a stronglygate-dependent singlet-triplet splitting on the low-spin side. The measuredbias-spectroscopy is shown to be consistent with an exact diagonalization ofthe Mn-complex, and an interpretation of the data is given in terms of asimplified effective model.



Author: Edgar A. Osorio, Kasper Moth-Poulsen, Herre S.J. van der Zant, Jens Paaske, Per Hedegard, Karsten Flensberg, Jesper Bendix, Thoma

Source: https://arxiv.org/







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