Low temperature ballistic spin transport in the S=1/2 antiferromagnetic Heisenberg chain compound SrCuO2

A. A. Zvyagin; A. Revcolevschi; B. B\"uchner; C. Hess; G. Pascua; H.-H. Klauss; H. Luetkens; H. Maeter; R. Saint-Martin; Z. Shermadini

arxiv: 1208.1162 · v1 · pith:O6EHHPW7new · submitted 2012-08-06 · ❄️ cond-mat.str-el

Low temperature ballistic spin transport in the S=1/2 antiferromagnetic Heisenberg chain compound SrCuO2

H. Maeter , A. A. Zvyagin , H. Luetkens , G. Pascua , Z. Shermadini , R. Saint-Martin , A. Revcolevschi , C. Hess

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B. B\"uchner H.-H. Klauss

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keywords spinfieldsrcuo2antiferromagneticballisticchainheisenbergmagnetic

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We report zero and longitudinal magnetic field muon spin relaxation measurements of the spin S=1/2 antiferromagnetic Heisenberg chain material SrCuO2. We find that in a weak applied magnetic field B the spin-lattice relaxation rate follows a power law B^n with n=-0.9(3). This result is temperature independent for 5K < T < 300 K. Within conformal field theory and using the M\"uller ansatz we conclude ballistic spin transport in SrCuO2.

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Low temperature ballistic spin transport in the S=1/2 antiferromagnetic Heisenberg chain compound SrCuO2

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