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

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 i...

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Bibliographic Details
Published in:arXiv.org 2012-08
Main Authors: Maeter, H, Zvyagin, A A, Luetkens, H, Pascua, G, Shermadini, Z, Saint-Martin, R, Revcolevschi, A, Hess, C, Büchner, B, H -H Klauss
Format: Article
Language:English
Subjects:
Antiferromagnetism
Chains
Field theory
Magnetic fields
Magnetic induction
Magnetism
Muon spin relaxation
Spin-lattice relaxation
Strontium copper oxide
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1208.1162