Electrical manipulation of spin states in a single electrostatically gated transition-metal complex

Edgar A Osorio; Kasper Moth-Poulsen; Herre S J van der Zant; Jens Paaske; Per Hedegård; Karsten Flensberg; Jesper Bendix; Thomas Bjørnholm

doi:10.1021/nl9029785

Electrical manipulation of spin states in a single electrostatically gated transition-metal complex

Edgar A Osorio, Kasper Moth-Poulsen, Herre S J van der Zant, Jens Paaske, Per Hedegård, Karsten Flensberg, Jesper Bendix, Thomas Bjørnholm

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Abstract

We demonstrate an electrically controlled high-spin (S = 5/2) to low-spin (S = 112) transition in a three-terminal device incorporating a single Mn ²⁺ ion coordinated by two terpyridine ligands. By adjusting the gate-voltage we reduce the terpyridine moiety and thereby strengthen the ligand-field on the Mn-atom. Adding a single electron thus stabilizes the low-spin configuration and the corresponding sequential tunnelling current is suppressed by spin-blockade. From low-temperature inelastic cotunneling spectroscopy, we infer the magnetic excitation spectrum of the molecule and uncover also a strongly gate-dependent singlet-triplet splitting on the low-spin side. The measured bias-spectroscopy is shown to be consistent with an exact diagonalization of the Mn-complex, and an interpretation of the data is given in terms of a simplified effective model.

Originalsprog	Engelsk
Tidsskrift	Nano Letters
Vol/bind	10
Udgave nummer	1
Sider (fra-til)	105-10
Antal sider	6
ISSN	1530-6984
DOI	https://doi.org/10.1021/nl9029785
Status	Udgivet - 13 jan. 2010

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Citationsformater

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abstract = "We demonstrate an electrically controlled high-spin (S = 5/2) to low-spin (S = 112) transition in a three-terminal device incorporating a single Mn 2+ ion coordinated by two terpyridine ligands. By adjusting the gate-voltage we reduce the terpyridine moiety and thereby strengthen the ligand-field on the Mn-atom. Adding a single electron thus stabilizes the low-spin configuration and the corresponding sequential tunnelling current is suppressed by spin-blockade. From low-temperature inelastic cotunneling spectroscopy, we infer the magnetic excitation spectrum of the molecule and uncover also a strongly gate-dependent singlet-triplet splitting on the low-spin side. The measured bias-spectroscopy is shown to be consistent with an exact diagonalization of the Mn-complex, and an interpretation of the data is given in terms of a simplified effective model.",

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T1 - Electrical manipulation of spin states in a single electrostatically gated transition-metal complex

AU - Osorio, Edgar A

AU - Moth-Poulsen, Kasper

AU - van der Zant, Herre S J

AU - Paaske, Jens

AU - Hedegård, Per

AU - Flensberg, Karsten

AU - Bendix, Jesper

AU - Bjørnholm, Thomas

PY - 2010/1/13

Y1 - 2010/1/13

N2 - We demonstrate an electrically controlled high-spin (S = 5/2) to low-spin (S = 112) transition in a three-terminal device incorporating a single Mn 2+ ion coordinated by two terpyridine ligands. By adjusting the gate-voltage we reduce the terpyridine moiety and thereby strengthen the ligand-field on the Mn-atom. Adding a single electron thus stabilizes the low-spin configuration and the corresponding sequential tunnelling current is suppressed by spin-blockade. From low-temperature inelastic cotunneling spectroscopy, we infer the magnetic excitation spectrum of the molecule and uncover also a strongly gate-dependent singlet-triplet splitting on the low-spin side. The measured bias-spectroscopy is shown to be consistent with an exact diagonalization of the Mn-complex, and an interpretation of the data is given in terms of a simplified effective model.

AB - We demonstrate an electrically controlled high-spin (S = 5/2) to low-spin (S = 112) transition in a three-terminal device incorporating a single Mn 2+ ion coordinated by two terpyridine ligands. By adjusting the gate-voltage we reduce the terpyridine moiety and thereby strengthen the ligand-field on the Mn-atom. Adding a single electron thus stabilizes the low-spin configuration and the corresponding sequential tunnelling current is suppressed by spin-blockade. From low-temperature inelastic cotunneling spectroscopy, we infer the magnetic excitation spectrum of the molecule and uncover also a strongly gate-dependent singlet-triplet splitting on the low-spin side. The measured bias-spectroscopy is shown to be consistent with an exact diagonalization of the Mn-complex, and an interpretation of the data is given in terms of a simplified effective model.

U2 - 10.1021/nl9029785

DO - 10.1021/nl9029785

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JO - Nano Letters

JF - Nano Letters

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ER -

Electrical manipulation of spin states in a single electrostatically gated transition-metal complex

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