Spin pseudogap in Ni-doped SrCuO2

G. Simutis; S. Gvasaliya; M. Månsson; A. L. Chernyshev; A. Mohan; S. Singh; C. Hess; A. T. Savici; A. I. Kolesnikov; A. Piovano; T. Perring; I. Zaliznyak; B. Büchner; A. Zheludev

doi:10.1103/PhysRevLett.111.067204

Spin pseudogap in Ni-doped SrCuO₂

G. Simutis, S. Gvasaliya, M. Månsson, A. L. Chernyshev, A. Mohan, S. Singh, C. Hess, A. T. Savici, A. I. Kolesnikov, A. Piovano, T. Perring, I. Zaliznyak, B. Büchner, A. Zheludev

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Abstract

The S=1/2 spin chain material SrCuO₂ doped with 1% S=1 Ni impurities is studied by inelastic neutron scattering. At low temperatures, the spectrum shows a pseudogap Δ≈8 meV, absent in the parent compound, and not related to any structural phase transition. The pseudogap is shown to be a generic feature of quantum spin chains with dilute defects. A simple model based on this idea quantitatively accounts for the experimental data measured in the temperature range from 2 to 300 K, and allows us to represent the momentum-integrated dynamic structure factor in a universal scaling form.

Original language	English
Article number	067204
Journal	Physical Review Letters
Volume	111
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.111.067204
State	Published - Aug 9 2013

Funding

Funders	Funder number
Seventh Framework Programme	238475
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	150148

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10.1103/PhysRevLett.111.067204

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title = "Spin pseudogap in Ni-doped SrCuO2",

abstract = "The S=1/2 spin chain material SrCuO2 doped with 1% S=1 Ni impurities is studied by inelastic neutron scattering. At low temperatures, the spectrum shows a pseudogap Δ≈8 meV, absent in the parent compound, and not related to any structural phase transition. The pseudogap is shown to be a generic feature of quantum spin chains with dilute defects. A simple model based on this idea quantitatively accounts for the experimental data measured in the temperature range from 2 to 300 K, and allows us to represent the momentum-integrated dynamic structure factor in a universal scaling form.",

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doi = "10.1103/PhysRevLett.111.067204",

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T1 - Spin pseudogap in Ni-doped SrCuO2

AU - Simutis, G.

AU - Gvasaliya, S.

AU - Månsson, M.

AU - Chernyshev, A. L.

AU - Mohan, A.

AU - Singh, S.

AU - Hess, C.

AU - Savici, A. T.

AU - Kolesnikov, A. I.

AU - Piovano, A.

AU - Perring, T.

AU - Zaliznyak, I.

AU - Büchner, B.

AU - Zheludev, A.

PY - 2013/8/9

Y1 - 2013/8/9

N2 - The S=1/2 spin chain material SrCuO2 doped with 1% S=1 Ni impurities is studied by inelastic neutron scattering. At low temperatures, the spectrum shows a pseudogap Δ≈8 meV, absent in the parent compound, and not related to any structural phase transition. The pseudogap is shown to be a generic feature of quantum spin chains with dilute defects. A simple model based on this idea quantitatively accounts for the experimental data measured in the temperature range from 2 to 300 K, and allows us to represent the momentum-integrated dynamic structure factor in a universal scaling form.

AB - The S=1/2 spin chain material SrCuO2 doped with 1% S=1 Ni impurities is studied by inelastic neutron scattering. At low temperatures, the spectrum shows a pseudogap Δ≈8 meV, absent in the parent compound, and not related to any structural phase transition. The pseudogap is shown to be a generic feature of quantum spin chains with dilute defects. A simple model based on this idea quantitatively accounts for the experimental data measured in the temperature range from 2 to 300 K, and allows us to represent the momentum-integrated dynamic structure factor in a universal scaling form.

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Spin pseudogap in Ni-doped SrCuO₂

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