Charge fluctuations in nonlinear heat transport

Article

关键词: SINGLE-MOLECULE JUNCTIONS;    QUANTUM-DOT;    RENORMALIZATION-GROUP;    CARBON NANOTUBES;    THERMOELECTRICITY;    THERMOPOWER;    EFFICIENCY;    SPECTRA;    FIELD;    POWER;   

DOI  :  10.1103/PhysRevB.91.201107

来源: SCIE

【 摘 要 】

We show that charge fluctuation processes are crucial for the nonlinear heat conductance through an interacting nanostructure, even far from a resonance. We illustrate this for an Anderson quantum dot accounting for the first two leading orders of the tunneling in a master equation. The often made assumption that off-resonant transport proceeds entirely by virtual occupation of charge states, underlying exchange-scattering models, can fail dramatically for heat transport. The identified energy-transport resonances in the Coulomb blockade regime provide qualitative information about relaxation processes, for instance, by a strong negative differential heat conductance relative to the heat current. These can go unnoticed in the charge current, making nonlinear heat-transport spectroscopy with energy-level control a promising experimental tool.

【 授权许可】

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