Current characteristics of a one-dimensional Hubbard chain: Role of correlation and dissipation

Article

关键词: WANNIER-STARK LADDERS;    ENERGY-FUNCTIONAL APPROACH;    BLOCH OSCILLATIONS;    PERTURBATION-THEORY;    ELECTRIC-FIELD;    SEMICONDUCTOR SUPERLATTICES;    RESONANCES;    TRANSPORT;    DYNAMICS;    STATES;   

DOI  :  10.1103/PhysRevB.92.125149

来源: SCIE

【 摘 要 】

We study the electronic transport in an infinite one-dimensional Hubbard chain, driven by a homogeneous electric field. The physical chain is coupled to fermionic bath chains in order to account for dissipation and to prevent the occurrence of Bloch oscillations. The steady-state current is computed in the frame of Keldysh Green's functions in cluster perturbation theory. The current characteristics are dominated by resonant-tunneling-like structures, which can be traced back to Wannier-Stark resonances due to antiferromagnetic correlations. The same current characteristic occurs in a noninteracting Wannier-Stark model with alternating on-site energies. Nonlocal effects of the self-energy can be accounted for the observed physical behavior.

【 授权许可】

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