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Conductivity in a disordered one-dimensional system of interacting fermions (CROSBI ID 166960)

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Barišić, Osor Slaven ; Prelovšek, Peter Conductivity in a disordered one-dimensional system of interacting fermions // Physical review. B, Condensed matter and materials physics, 82 (2010), 161106(R)-1-161106(R)-4. doi: 10.1103/PhysRevB.82.161106

Podaci o odgovornosti

Barišić, Osor Slaven ; Prelovšek, Peter

engleski

Conductivity in a disordered one-dimensional system of interacting fermions

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 d.c. transport coefficients. On the contrary, we find in the regime of moderately strong local disorder that the d.c. conductivity 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 of the effective localization length with the interaction.

many-body localization; disorder; conductivity; spin chain

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Podaci o izdanju

82

2010.

161106(R)-1-161106(R)-4

objavljeno

1098-0121

10.1103/PhysRevB.82.161106

Povezanost rada

Fizika

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