期刊
PHYSICAL REVIEW B
卷 80, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.155322
关键词
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资金
- NSERC
- CIFAR
- McGill Centre for the Physics of Materials
- Department of Energy in USA [DE-FG02-08ER46541]
- U.S. Department of Energy (DOE) [DE-FG02-08ER46541] Funding Source: U.S. Department of Energy (DOE)
Using a Fermi-liquid approach, we provide a comprehensive treatment of the current and current noise through a quantum dot whose low-energy behavior corresponds to an SU(N) Kondo model, focusing on the case N=4 relevant to carbon nanotube dots. We show that for general N, one needs to consider the effects of higher-order Fermi-liquid corrections even to describe low-voltage current and noise. We also show that the noise exhibits complex behavior due to the interplay between coherent shot noise, and noise arising from interaction-induced scattering events. We also treat various imperfections relevant to experiments, such as the effects of asymmetric dot-lead couplings.
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