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】
Free