Investigation of surface magnetic noise by shallow spins in diamond

T. Rosskopf, A. Dussaux, K. Ohashi, M. Loretz, R. Schirhagl, H. Watanabe, S. Shikata, Kohei M Itoh, C. L. Degen

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

We present measurements of spin relaxation times (T1, T1ρ, T2) on very shallow (5nm) nitrogen-vacancy centers in high-purity diamond single crystals. We find a reduction of spin relaxation times up to 30 times compared to bulk values, indicating the presence of ubiquitous magnetic impurities associated with the surface. Our measurements yield a density of 0.01-0.1μB/nm2 and a characteristic correlation time of 0.28(3) ns of surface states, with little variation between samples and chemical surface terminations. A low temperature measurement further confirms that fluctuations are thermally activated. The data support the atomistic picture where impurities are associated with the top carbon layers, and not with terminating surface atoms or adsorbate molecules. The low spin density implies that the presence of a single surface impurity is sufficient to cause spin relaxation of a shallow nitrogen-vacancy center.

Original languageEnglish
Article number147602
JournalPhysical Review Letters
Volume112
Issue number14
DOIs
Publication statusPublished - 2014 Apr 9

Fingerprint

diamonds
impurities
relaxation time
nitrogen
stopping
temperature measurement
purity
causes
carbon
single crystals
atoms
molecules

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Rosskopf, T., Dussaux, A., Ohashi, K., Loretz, M., Schirhagl, R., Watanabe, H., ... Degen, C. L. (2014). Investigation of surface magnetic noise by shallow spins in diamond. Physical Review Letters, 112(14), [147602]. https://doi.org/10.1103/PhysRevLett.112.147602

Investigation of surface magnetic noise by shallow spins in diamond. / Rosskopf, T.; Dussaux, A.; Ohashi, K.; Loretz, M.; Schirhagl, R.; Watanabe, H.; Shikata, S.; Itoh, Kohei M; Degen, C. L.

In: Physical Review Letters, Vol. 112, No. 14, 147602, 09.04.2014.

Research output: Contribution to journalArticle

Rosskopf, T, Dussaux, A, Ohashi, K, Loretz, M, Schirhagl, R, Watanabe, H, Shikata, S, Itoh, KM & Degen, CL 2014, 'Investigation of surface magnetic noise by shallow spins in diamond', Physical Review Letters, vol. 112, no. 14, 147602. https://doi.org/10.1103/PhysRevLett.112.147602
Rosskopf T, Dussaux A, Ohashi K, Loretz M, Schirhagl R, Watanabe H et al. Investigation of surface magnetic noise by shallow spins in diamond. Physical Review Letters. 2014 Apr 9;112(14). 147602. https://doi.org/10.1103/PhysRevLett.112.147602
Rosskopf, T. ; Dussaux, A. ; Ohashi, K. ; Loretz, M. ; Schirhagl, R. ; Watanabe, H. ; Shikata, S. ; Itoh, Kohei M ; Degen, C. L. / Investigation of surface magnetic noise by shallow spins in diamond. In: Physical Review Letters. 2014 ; Vol. 112, No. 14.
@article{ef9462c92c394e079829846ea632bde9,
title = "Investigation of surface magnetic noise by shallow spins in diamond",
abstract = "We present measurements of spin relaxation times (T1, T1ρ, T2) on very shallow (5nm) nitrogen-vacancy centers in high-purity diamond single crystals. We find a reduction of spin relaxation times up to 30 times compared to bulk values, indicating the presence of ubiquitous magnetic impurities associated with the surface. Our measurements yield a density of 0.01-0.1μB/nm2 and a characteristic correlation time of 0.28(3) ns of surface states, with little variation between samples and chemical surface terminations. A low temperature measurement further confirms that fluctuations are thermally activated. The data support the atomistic picture where impurities are associated with the top carbon layers, and not with terminating surface atoms or adsorbate molecules. The low spin density implies that the presence of a single surface impurity is sufficient to cause spin relaxation of a shallow nitrogen-vacancy center.",
author = "T. Rosskopf and A. Dussaux and K. Ohashi and M. Loretz and R. Schirhagl and H. Watanabe and S. Shikata and Itoh, {Kohei M} and Degen, {C. L.}",
year = "2014",
month = "4",
day = "9",
doi = "10.1103/PhysRevLett.112.147602",
language = "English",
volume = "112",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "14",

}

TY - JOUR

T1 - Investigation of surface magnetic noise by shallow spins in diamond

AU - Rosskopf, T.

AU - Dussaux, A.

AU - Ohashi, K.

AU - Loretz, M.

AU - Schirhagl, R.

AU - Watanabe, H.

AU - Shikata, S.

AU - Itoh, Kohei M

AU - Degen, C. L.

PY - 2014/4/9

Y1 - 2014/4/9

N2 - We present measurements of spin relaxation times (T1, T1ρ, T2) on very shallow (5nm) nitrogen-vacancy centers in high-purity diamond single crystals. We find a reduction of spin relaxation times up to 30 times compared to bulk values, indicating the presence of ubiquitous magnetic impurities associated with the surface. Our measurements yield a density of 0.01-0.1μB/nm2 and a characteristic correlation time of 0.28(3) ns of surface states, with little variation between samples and chemical surface terminations. A low temperature measurement further confirms that fluctuations are thermally activated. The data support the atomistic picture where impurities are associated with the top carbon layers, and not with terminating surface atoms or adsorbate molecules. The low spin density implies that the presence of a single surface impurity is sufficient to cause spin relaxation of a shallow nitrogen-vacancy center.

AB - We present measurements of spin relaxation times (T1, T1ρ, T2) on very shallow (5nm) nitrogen-vacancy centers in high-purity diamond single crystals. We find a reduction of spin relaxation times up to 30 times compared to bulk values, indicating the presence of ubiquitous magnetic impurities associated with the surface. Our measurements yield a density of 0.01-0.1μB/nm2 and a characteristic correlation time of 0.28(3) ns of surface states, with little variation between samples and chemical surface terminations. A low temperature measurement further confirms that fluctuations are thermally activated. The data support the atomistic picture where impurities are associated with the top carbon layers, and not with terminating surface atoms or adsorbate molecules. The low spin density implies that the presence of a single surface impurity is sufficient to cause spin relaxation of a shallow nitrogen-vacancy center.

UR - http://www.scopus.com/inward/record.url?scp=84898440955&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84898440955&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.112.147602

DO - 10.1103/PhysRevLett.112.147602

M3 - Article

VL - 112

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 14

M1 - 147602

ER -