Blog
About

1
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Instability of subdiffusive spin dynamics in strongly disordered Hubbard chain

      Preprint

      , ,

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          We study spin transport in a Hubbard chain with strong, random, on--site potential and with spin--dependent hopping integrals, \(t_{\sigma}\). For the the SU(2) symmetric case, \(t_{\uparrow} =t_{\downarrow}\), such model exhibits only partial many-body localization with localized charge and (delocalized) subdiffusive spin excitations. Here, we demonstrate that breaking the SU(2) symmetry by even weak spin--asymmetry, \(t_{\uparrow} \ne t_{\downarrow}\), localizes spins and restores full many-body localization. To this end we derive an effective spin model, where the spin subdiffusion is shown to be destroyed by arbitrarily weak \(t_{\uparrow} \ne t_{\downarrow}\). Instability of the spin subdiffusion originates from an interplay between random effective fields and singularly distributed random exchange interactions.

          Related collections

          Most cited references 29

          • Record: found
          • Abstract: not found
          • Article: not found

          Localization of interacting fermions at high temperature

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Observation of many-body localization of interacting fermions in a quasirandom optical lattice

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Phenomenology of fully many-body-localized systems

                Bookmark

                Author and article information

                Journal
                09 March 2019
                Article
                10.1103/PhysRevB.99.121110
                1903.03770

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

                Custom metadata
                accepted as a Rapid Communication in Physical Review B
                cond-mat.str-el cond-mat.dis-nn

                Condensed matter, Theoretical physics

                Comments

                Comment on this article