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Low temperature ballistic spin transport in the S = 1/2 antiferromagnetic Heisenberg chain compound SrCuO2. 2013
H Maeter, and
A A Zvyagin, and
H Luetkens, and
G Pascua, and
Z Shermadini, and
R Saint-Martin, and
A Revcolevschi, and
C Hess, and
B Büchner, and
H-H Klauss
Institute for Solid State Physics, TU Dresden, D-01069 Dresden, Germany.
We report zero and longitudinal magnetic field muon spin relaxation (μSR) measurements of the spin S = 1/2 antiferromagnetic Heisenberg chain material SrCuO2. We find that in a weak applied magnetic field B0 the spin-lattice relaxation rate λ follows a power law λ is proportional to B(0)(-n) with n = 0.9(3). This result is temperature independent for 5 K ≤ T ≤ 300 K. Within conformal field theory and using the Müller ansatz we conclude ballistic spin transport in SrCuO2.
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