Year: 2009
Type: article
Abstract: 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.
Source: Europhysics Letters (EPL)
Authors: Giuliano Benenti, Giulio Casati, Tomaž Prosen, Davide Rossini
Institutions: University of Insubria, National Interuniversity Consortium for the Physical Sciences of Matter, Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Centre for Quantum Technologies, National University of Singapore, University of Ljubljana, Scuola Internazionale Superiore di Studi Avanzati
Language: English
Topic: Quantum many-body systems
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1982910421