Ballistic heat transport of quantum spin excitations as seen in
N Hlubek, P Ribeiro, R Saint-Martin… - Physical Review B …, 2010 - APS
Physical Review B—Condensed Matter and Materials Physics, 2010•APS
Fundamental conservation laws predict ballistic, ie, dissipationless transport behavior in one-
dimensional quantum magnets. Experimental evidence, however, for such anomalous
transport has been lacking ever since. Here we provide experimental evidence for ballistic
heat transport in a S= 1/2 Heisenberg chain. In particular, we investigate high purity samples
of the chain cuprate SrCuO 2 and observe a huge magnetic heat conductivity κ mag. An
extremely large spinon mean-free path of more than a micrometer demonstrates that κ mag …
dimensional quantum magnets. Experimental evidence, however, for such anomalous
transport has been lacking ever since. Here we provide experimental evidence for ballistic
heat transport in a S= 1/2 Heisenberg chain. In particular, we investigate high purity samples
of the chain cuprate SrCuO 2 and observe a huge magnetic heat conductivity κ mag. An
extremely large spinon mean-free path of more than a micrometer demonstrates that κ mag …
Fundamental conservation laws predict ballistic, i.e., dissipationless transport behavior in one-dimensional quantum magnets. Experimental evidence, however, for such anomalous transport has been lacking ever since. Here we provide experimental evidence for ballistic heat transport in a Heisenberg chain. In particular, we investigate high purity samples of the chain cuprate and observe a huge magnetic heat conductivity . An extremely large spinon mean-free path of more than a micrometer demonstrates that is only limited by extrinsic scattering processes which is a clear signature of ballistic transport in the underlying spin model.
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