Current fluctuations in a two-level quantum dot coupled to the spin-polarized leads are studied by means of the Markovian master equation. It is shown, that transitions between spin configurations of the system cause switching between different current channels, which generates the super-Poissonian noise enhancement and the correlation between subsequent waiting times separating the successive tunneling events.
机构:
Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China
Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R ChinaHuazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China
Ke, Sha-Sha
Lue, Hai-Feng
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Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R China
Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R ChinaHuazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China
Lue, Hai-Feng
Li, Gao-Xiang
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Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R ChinaHuazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China