2010/09/01 by O. S. Barišić, P. Prelovšek · 1 citation
Physics and Astronomy · #Charge (physics) #Condensed matter physics #Conductivity #Electrical resistivity and conductivity #Fermion #Order (exchange) #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum many-body systems #Quantum mechanics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.82.161106
4 pages, 5 figures, submitted to PRB
arxiv created 2010/09/01 · openalex publication_date 2010/10/29 · arxiv updated 2015/05/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Dynamical conductivity in a disordered one-dimensional model of interacting fermions is studied numerically at high temperatures and in the weak-interaction regime in order to find a signature of many-body localization and vanishing dc transport coefficients. On the contrary, we find in the regime of moderately strong local disorder that the dc conductivity \ensuremathσ0 scales linearly with the interaction strength while being exponentially dependent on the disorder. According to the behavior of the charge stiffness evaluated at the fixed number of particles, the absence of the many-body localization seems related to an increase in the effective localization length with the interaction.