Tunable Doping of a Metal with Molecular Spins

T. Gang, M.D. Yilmaz, Derya Ataç, Saurabh Bose, Elia Strambini, Aldrik Velders, Machiel Pieter de Jong, Jurriaan Huskens, Wilfred Gerard van der Wiel

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Abstract

The mutual interaction of localized magnetic moments and their interplay with itinerant conduction electrons in a solid are central to many phenomena in condensed-matter physics, including magnetic ordering and related many-body phenomena such as the Kondo effect(1), the Ruderman-Kittel-Kasuya-Yoshida interaction(2) and carrier-induced ferromagnetism in diluted magnetic semiconductors(3). The strength and relative importance of these spin phenomena are determined by the magnitude and sign of the exchange interaction between the localized magnetic moments and also by the mean distance between them. Detailed studies of such systems require the ability to tune the mean distance between the localized magnetic moments, which is equivalent to being able to control the concentration of magnetic impurities in the host material. Here, we present a method for doping a gold film with localized magnetic moments that involves depositing a monolayer of a metal terpyridine complex onto the film. The metal ions in the complexes can be cobalt or zinc, and the concentration of magnetic impurities in the gold film can be controlled by varying the relative amounts of cobalt complexes (which carry a spin) and zinc complexes (which have zero spin). Kondo and weak localization measurements demonstrate that the magnetic impurity concentration can be systematically varied up to similar to 800 ppm without any sign of inter-impurity interaction. Moreover, we find no evidence for the unwanted clustering that is often produced when using alternative methods.
Original languageUndefined
Pages (from-to)232-236
Number of pages5
JournalNature nanotechnology
Volume7
Issue number4
DOIs
Publication statusPublished - Apr 2012

Keywords

  • SMI-NE: From 2006 in EWI-NE
  • IR-83569
  • METIS-293823
  • EWI-22904

Cite this

Gang, T. ; Yilmaz, M.D. ; Ataç, Derya ; Bose, Saurabh ; Strambini, Elia ; Velders, Aldrik ; de Jong, Machiel Pieter ; Huskens, Jurriaan ; van der Wiel, Wilfred Gerard. / Tunable Doping of a Metal with Molecular Spins. In: Nature nanotechnology. 2012 ; Vol. 7, No. 4. pp. 232-236.
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abstract = "The mutual interaction of localized magnetic moments and their interplay with itinerant conduction electrons in a solid are central to many phenomena in condensed-matter physics, including magnetic ordering and related many-body phenomena such as the Kondo effect(1), the Ruderman-Kittel-Kasuya-Yoshida interaction(2) and carrier-induced ferromagnetism in diluted magnetic semiconductors(3). The strength and relative importance of these spin phenomena are determined by the magnitude and sign of the exchange interaction between the localized magnetic moments and also by the mean distance between them. Detailed studies of such systems require the ability to tune the mean distance between the localized magnetic moments, which is equivalent to being able to control the concentration of magnetic impurities in the host material. Here, we present a method for doping a gold film with localized magnetic moments that involves depositing a monolayer of a metal terpyridine complex onto the film. The metal ions in the complexes can be cobalt or zinc, and the concentration of magnetic impurities in the gold film can be controlled by varying the relative amounts of cobalt complexes (which carry a spin) and zinc complexes (which have zero spin). Kondo and weak localization measurements demonstrate that the magnetic impurity concentration can be systematically varied up to similar to 800 ppm without any sign of inter-impurity interaction. Moreover, we find no evidence for the unwanted clustering that is often produced when using alternative methods.",
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Tunable Doping of a Metal with Molecular Spins. / Gang, T.; Yilmaz, M.D.; Ataç, Derya; Bose, Saurabh; Strambini, Elia; Velders, Aldrik; de Jong, Machiel Pieter; Huskens, Jurriaan; van der Wiel, Wilfred Gerard.

In: Nature nanotechnology, Vol. 7, No. 4, 04.2012, p. 232-236.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Tunable Doping of a Metal with Molecular Spins

AU - Gang, T.

AU - Yilmaz, M.D.

AU - Ataç, Derya

AU - Bose, Saurabh

AU - Strambini, Elia

AU - Velders, Aldrik

AU - de Jong, Machiel Pieter

AU - Huskens, Jurriaan

AU - van der Wiel, Wilfred Gerard

N1 - eemcs-eprint-22904

PY - 2012/4

Y1 - 2012/4

N2 - The mutual interaction of localized magnetic moments and their interplay with itinerant conduction electrons in a solid are central to many phenomena in condensed-matter physics, including magnetic ordering and related many-body phenomena such as the Kondo effect(1), the Ruderman-Kittel-Kasuya-Yoshida interaction(2) and carrier-induced ferromagnetism in diluted magnetic semiconductors(3). The strength and relative importance of these spin phenomena are determined by the magnitude and sign of the exchange interaction between the localized magnetic moments and also by the mean distance between them. Detailed studies of such systems require the ability to tune the mean distance between the localized magnetic moments, which is equivalent to being able to control the concentration of magnetic impurities in the host material. Here, we present a method for doping a gold film with localized magnetic moments that involves depositing a monolayer of a metal terpyridine complex onto the film. The metal ions in the complexes can be cobalt or zinc, and the concentration of magnetic impurities in the gold film can be controlled by varying the relative amounts of cobalt complexes (which carry a spin) and zinc complexes (which have zero spin). Kondo and weak localization measurements demonstrate that the magnetic impurity concentration can be systematically varied up to similar to 800 ppm without any sign of inter-impurity interaction. Moreover, we find no evidence for the unwanted clustering that is often produced when using alternative methods.

AB - The mutual interaction of localized magnetic moments and their interplay with itinerant conduction electrons in a solid are central to many phenomena in condensed-matter physics, including magnetic ordering and related many-body phenomena such as the Kondo effect(1), the Ruderman-Kittel-Kasuya-Yoshida interaction(2) and carrier-induced ferromagnetism in diluted magnetic semiconductors(3). The strength and relative importance of these spin phenomena are determined by the magnitude and sign of the exchange interaction between the localized magnetic moments and also by the mean distance between them. Detailed studies of such systems require the ability to tune the mean distance between the localized magnetic moments, which is equivalent to being able to control the concentration of magnetic impurities in the host material. Here, we present a method for doping a gold film with localized magnetic moments that involves depositing a monolayer of a metal terpyridine complex onto the film. The metal ions in the complexes can be cobalt or zinc, and the concentration of magnetic impurities in the gold film can be controlled by varying the relative amounts of cobalt complexes (which carry a spin) and zinc complexes (which have zero spin). Kondo and weak localization measurements demonstrate that the magnetic impurity concentration can be systematically varied up to similar to 800 ppm without any sign of inter-impurity interaction. Moreover, we find no evidence for the unwanted clustering that is often produced when using alternative methods.

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KW - EWI-22904

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DO - 10.1038/nnano.2012.1

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EP - 236

JO - Nature nanotechnology

JF - Nature nanotechnology

SN - 1748-3387

IS - 4

ER -

Gang T, Yilmaz MD, Ataç D, Bose S, Strambini E, Velders A et al. Tunable Doping of a Metal with Molecular Spins. Nature nanotechnology. 2012 Apr;7(4):232-236. https://doi.org/10.1038/nnano.2012.1