標題: Finite-frequency-dependent noise of a quantum dot in a magnetic field
作者: Moca, C. P.
Simon, P.
Chung, Chung-Hou
Zarand, G.
電子物理學系
Department of Electrophysics
公開日期: 29-四月-2014
摘要: We present a detailed study for the finite- frequency current noise of a Kondo quantum dot in the presence of a magnetic field by using a recently developed real- time functional renormalization group approach [C. P. Moca, P. Simon, C. H. Chung, and G. Zarand, Phys. Rev. B 83, 201303(R) (2011)]. The scaling equations are modified in an external magnetic field; the couplings and nonlocal current vertices become strongly anisotropic, and develop new singularities. Consequently, in addition to the natural emission threshold frequency, (sis) omega = | eV |, a corresponding singular behavior is found to emerge in the noise spectrum at frequencies (sis)omega approximate to | eV +/- B|. The predicted singularities are measurable with present- day experimental techniques.
URI: http://dx.doi.org/10.1103/PhysRevB.89.155138
http://hdl.handle.net/11536/24220
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.89.155138
期刊: PHYSICAL REVIEW B
Volume: 89
Issue: 15
結束頁: 
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