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arXiv 1306.0840cond-mat.str-elcond-mat.mes-hallcond-mat.stat-mech
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超越线性响应的强关联热电输运

Strongly-Correlated Thermoelectric Transport beyond Linear Response

Prasenjit Dutt, Karyn Le Hur

摘要:

我们研究了具有强现场相互作用的量子杂质系统的非线性热电输运。我们表明,通过相互作用的量子杂质与电子库在显着不同的温度下接触的稳态传输可以被捕获的有效平衡密度矩阵,表示competencies在李普曼-Schwinger运营商的系统。此外,储层可以保持在任意的化学势。温度梯度和偏置电压之间的相互作用引起了一个非平凡的打破强相关制度中的粒子-空穴对称性,表现在Abrikosov-Suhl局域电子共振。这种纯粹的多体效应与实验结果一致,超出了平均场理论的范围。

英文摘要:

We investigate nonlinear thermoelectric transport through quantum impurity systems with strong on-site interactions. We show that the steady-state transport through interacting quantum impurities in contact with electron reservoirs at significantly different temperatures can be captured by an effective-equilibrium density matrix, expressed compactly in terms of the Lippmann-Schwinger operators of the system. In addition, the reservoirs can be maintained at arbitrary chemical potentials. The interplay between the temperature gradient and bias voltage gives rise to a non-trivial breaking of particle-hole symmetry in the strongly correlated regime, manifest in the Abrikosov-Suhl localized electron resonance. This purely many-body effect, which is in agreement with experimental results, is beyond the purview of mean-field arguments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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