Multi-step shot noise spectrum induced by a local large spin

doi:10.1088/1674-1056/24/12/127309

Abstract We use non-equilibrium Green's function method to analyze the shot noise spectrum of artificial single molecular magnets (ASMM) model in the strong spin-orbit coupling limit in sequential tunneling regime, mainly focusing on the effects of local large spin. In the linear response regime, the shot noise shows 2S+1 peaks and is strongly spin-dependent. In the nonlinear response regime, one can observe 2S+1 steps in shot noise and Fano factor. In these steps one can see the significant enhancement effect due to the spin-dependent multi-channel process of local large spin, which reduces electron correlations.

Keywords: artificial single molecular magnet Hubbard operator Green's function shot noise

Received: 09 July 2015
Revised: 15 August 2015
Accepted manuscript online:

PACS:	73.63.Kv	(Quantum dots)
	72.70.+m	(Noise processes and phenomena)
	73.23.Hk	(Coulomb blockade; single-electron tunneling)
	73.63.-b	(Electronic transport in nanoscale materials and structures)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11504210, 11504211, 11504212, 11274207, 11274208, 11174115, and 11325417), the Key Program of the Ministry of Education of China (Grant No. 212018), the Scientific and Technological Project of Shanxi Province, China (Grant No. 2015031002-2), the Natural Science Foundation of Shanxi Province, China (Grant Nos. 2013011007-2 and 2013021010-5), and the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi Province, China.

Corresponding Authors: Niu Peng-Bin
E-mail: niupengbin@163.com

Cite this article:

Niu Peng-Bin (牛鹏斌), Shi Yun-Long (石云龙), Sun Zhu (孙祝), Nie Yi-Hang (聂一行) Multi-step shot noise spectrum induced by a local large spin 2015 Chin. Phys. B 24 127309

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