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, B. B\"uchner, and H.-H. Klauss
TL;DR
This study investigates spin transport in the S=1/2 antiferromagnetic Heisenberg chain compound SrCuO2, revealing temperature-independent ballistic spin transport at low temperatures through muon spin relaxation measurements.
Contribution
It provides experimental evidence of ballistic spin transport in SrCuO2 using muon spin relaxation, supported by conformal field theory analysis.
Findings
Spin-lattice relaxation rate follows a power law B^n with n=-0.9(3).
Relaxation rate is temperature independent between 5K and 300K.
Evidence supports ballistic spin transport in SrCuO2.
Abstract
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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