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

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

中国物理B ›› 2015, Vol. 24 ›› Issue (12): 127309-127309.doi: 10.1088/1674-1056/24/12/127309

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

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

牛鹏斌^a, 石云龙^a, 孙祝^a, 聂一行^b

a Institute of Solid State Physics and Department of Physics, Shanxi Provincial Key Laboratory of Micro-structural Electromagnetic Functional Materials, Shanxi Datong University, Datong 037009, China;
b Institute of Theoretical Physics and Department of Physics, Shanxi University, Taiyuan 030006, China

收稿日期:2015-07-09 修回日期:2015-08-15 出版日期:2015-12-05 发布日期:2015-12-05
通讯作者: Niu Peng-Bin E-mail:niupengbin@163.com
基金资助:
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.

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

Niu Peng-Bin (牛鹏斌)^a, Shi Yun-Long (石云龙)^a, Sun Zhu (孙祝)^a, Nie Yi-Hang (聂一行)^b

a Institute of Solid State Physics and Department of Physics, Shanxi Provincial Key Laboratory of Micro-structural Electromagnetic Functional Materials, Shanxi Datong University, Datong 037009, China;
b Institute of Theoretical Physics and Department of Physics, Shanxi University, Taiyuan 030006, China

Received:2015-07-09 Revised:2015-08-15 Online:2015-12-05 Published:2015-12-05
Contact: Niu Peng-Bin E-mail:niupengbin@163.com
Supported by:
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.

摘要/Abstract

摘要： 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.

关键词: artificial single molecular magnet, Hubbard operator Green', s function, shot noise

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.

Key words: artificial single molecular magnet, Hubbard operator Green's function, shot noise

中图分类号: (Quantum dots)

73.63.Kv

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)

牛鹏斌, 石云龙, 孙祝, 聂一行. Multi-step shot noise spectrum induced by a local large spin[J]. 中国物理B, 2015, 24(12): 127309-127309.

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[J]. Chin. Phys. B, 2015, 24(12): 127309-127309.

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

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

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