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The shot noise of a strongly correlated quantum dot coupled to the Luttinger liquid leads
Authors:Kai-Hua Yang  Xian He  Huai-Yu Wang  Kai-Di Liu  Bei-Yun Liu
Institution:1. College of Applied Sciences, Beijing University of Technology, Beijing 100122, China;2. Department of Physics, Tsinghua University, Beijing 100084, China
Abstract:We study the shot noise of a strongly correlated quantum dot weakly coupled to Luttinger liquid leads in the Kondo regime by means of the extended equation of motion method. A general zero-frequency shot noise formula with good convergence is derived. The shot noise exhibits a non-monotonic dependence on voltage for weak intralead interaction. There is a peak around the Kondo temperature at low voltage when the interaction is very weak, and its height decreases rapidly with the intralead interaction increasing. When the interaction is moderately strong the peak disappears and the shot noise scales as a power law in bias voltage, indicating that the intralead electron interaction suppresses the shot noise. It is possible that the measurements of the shot noise spectrum can extract the information of the intralead interaction.
Keywords:Kondo effect  Luttinger liquid  Shot noise
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