Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-06-13
Eurphys. Lett. 85, 37001 (2009)
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 4 figures. Published version
Scientific paper
10.1209/0295-5075/85/37001
We show that, when a finite anisotropic Heisenberg spin-1/2 chain in the gapped regime is driven far from equilibrium, oppositely polarized ferromagnetic domains build up at the edges of the chain, thus suppressing quantum spin transport. As a consequence, a negative differential conductivity regime arises, where increasing the driving decreases the current. The above results are explained in terms of magnon localization and are shown to be structurally stable against breaking of integrability.
Benenti Giuliano
Casati Giulio
Prosen Tomaz
Rossini Davide
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