Spin dynamics of the 2D spin ½ quantum antiferromagnet copper deuteroformate tetradeuterate (CFTD)

H.M. Rønnow; D.F. McMorrow; R. Coldea; A. Harrison; I.D. Youngson; T.G. Perring; G. Aeppli; O. Syljuåsen; K. Lefmann; C. Rischel

doi:10.1103/PhysRevLett.87.037202

Spin dynamics of the 2D spin ½ quantum antiferromagnet copper deuteroformate tetradeuterate (CFTD)

H.M. Rønnow, D.F. McMorrow, R. Coldea, A. Harrison, I.D. Youngson, T.G. Perring, G. Aeppli, O. Syljuåsen, K. Lefmann, C. Rischel

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Abstract

The magnetic excitation spectrum in the two-dimensional (2D) S = 1/2 Heisenberg antiferromagnet copper deuteroformate tetradeuterate has been measured for temperatures up to T similar to J/2, where J = 6.31 +/- 0.02 meV is the 2D exchange coupling. For T << J, a dispersion of the zone boundary energy is observed, which is attributed to a wave vector dependent quantum renormalization. At higher temperatures, spin-wavelike excitations persist, but are found to broaden and soften. By combining our data with numerical calculations, and with existing theoretical work, a consistent description of the behavior of the model system is found over the whole temperature interval investigated.

Original language	English
Journal	Physical Review Letters
Volume	87
Issue number	3
Pages (from-to)	037202.1-037202.4 ( and reply to comment (Peter Kopietz and Ivan Spremo) Phys. Rev. Lett. 2002, v. 89, art. no. 079702)
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.87.037202
Publication status	Published - 2001

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Rønnow, H. M., McMorrow, D. F., Coldea, R., Harrison, A., Youngson, I. D., Perring, T. G., Aeppli, G., Syljuåsen, O., Lefmann, K., & Rischel, C. (2001). Spin dynamics of the 2D spin ½ quantum antiferromagnet copper deuteroformate tetradeuterate (CFTD). Physical Review Letters, 87(3), 037202.1-037202.4 ( and reply to comment (Peter Kopietz and Ivan Spremo) Phys. Rev. Lett. 2002, v. 89, art. no. 079702). https://doi.org/10.1103/PhysRevLett.87.037202

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abstract = "The magnetic excitation spectrum in the two-dimensional (2D) S = 1/2 Heisenberg antiferromagnet copper deuteroformate tetradeuterate has been measured for temperatures up to T similar to J/2, where J = 6.31 +/- 0.02 meV is the 2D exchange coupling. For T << J, a dispersion of the zone boundary energy is observed, which is attributed to a wave vector dependent quantum renormalization. At higher temperatures, spin-wavelike excitations persist, but are found to broaden and soften. By combining our data with numerical calculations, and with existing theoretical work, a consistent description of the behavior of the model system is found over the whole temperature interval investigated. ",

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Rønnow, HM, McMorrow, DF, Coldea, R, Harrison, A, Youngson, ID, Perring, TG, Aeppli, G, Syljuåsen, O, Lefmann, K & Rischel, C 2001, 'Spin dynamics of the 2D spin ½ quantum antiferromagnet copper deuteroformate tetradeuterate (CFTD)', Physical Review Letters, vol. 87, no. 3, pp. 037202.1-037202.4 ( and reply to comment (Peter Kopietz and Ivan Spremo) Phys. Rev. Lett. 2002, v. 89, art. no. 079702). https://doi.org/10.1103/PhysRevLett.87.037202

Spin dynamics of the 2D spin ½ quantum antiferromagnet copper deuteroformate tetradeuterate (CFTD). / Rønnow, H.M.; McMorrow, D.F.; Coldea, R. et al.
In: Physical Review Letters, Vol. 87, No. 3, 2001, p. 037202.1-037202.4 ( and reply to comment (Peter Kopietz and Ivan Spremo) Phys. Rev. Lett. 2002, v. 89, art. no. 079702).

Research output: Contribution to journal › Journal article › Research › peer-review

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AU - Rønnow, H.M.

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AU - Harrison, A.

AU - Youngson, I.D.

AU - Perring, T.G.

AU - Aeppli, G.

AU - Syljuåsen, O.

AU - Lefmann, K.

AU - Rischel, C.

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N2 - The magnetic excitation spectrum in the two-dimensional (2D) S = 1/2 Heisenberg antiferromagnet copper deuteroformate tetradeuterate has been measured for temperatures up to T similar to J/2, where J = 6.31 +/- 0.02 meV is the 2D exchange coupling. For T << J, a dispersion of the zone boundary energy is observed, which is attributed to a wave vector dependent quantum renormalization. At higher temperatures, spin-wavelike excitations persist, but are found to broaden and soften. By combining our data with numerical calculations, and with existing theoretical work, a consistent description of the behavior of the model system is found over the whole temperature interval investigated.

AB - The magnetic excitation spectrum in the two-dimensional (2D) S = 1/2 Heisenberg antiferromagnet copper deuteroformate tetradeuterate has been measured for temperatures up to T similar to J/2, where J = 6.31 +/- 0.02 meV is the 2D exchange coupling. For T << J, a dispersion of the zone boundary energy is observed, which is attributed to a wave vector dependent quantum renormalization. At higher temperatures, spin-wavelike excitations persist, but are found to broaden and soften. By combining our data with numerical calculations, and with existing theoretical work, a consistent description of the behavior of the model system is found over the whole temperature interval investigated.

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Rønnow HM, McMorrow DF, Coldea R, Harrison A, Youngson ID, Perring TG et al. Spin dynamics of the 2D spin ½ quantum antiferromagnet copper deuteroformate tetradeuterate (CFTD). Physical Review Letters. 2001;87(3):037202.1-037202.4 ( and reply to comment (Peter Kopietz and Ivan Spremo) Phys. Rev. Lett. 2002, v. 89, art. no. 079702). doi: 10.1103/PhysRevLett.87.037202

Spin dynamics of the 2D spin ½ quantum antiferromagnet copper deuteroformate tetradeuterate (CFTD)

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