Shot noise spectroscopy on a semiconductor quantum dot in the elastic and inelastic cotunneling regimes

被引：29
|
作者：
Okazaki, Yuma [1 ,2 ]
Sasaki, Satoshi [1 ,2 ]
Muraki, Koji [1 ]
机构：
[1] NTT Corp, NTT Basic Res Labs, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 2430198, Japan
[2] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan
来源：
PHYSICAL REVIEW B | 2013年 / 87卷 / 04期
关键词：
TRANSPORT;
D O I：
10.1103/PhysRevB.87.041302
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report shot noise spectroscopy on a semiconductor quantum dot in a cotunneling regime. The dc conductance measurements show clear signatures of both elastic and inelastic cotunneling transport inside a Coulomb diamond. We observed Poissonian shot noise with the Fano factor F approximate to 1 in the elastic cotunneling regime, and super-Poissonian Fano factor 1 < F < 3 in the inelastic cotunneling regime. The differences in the value of the Fano factor between elastic and inelastic processes reveal the microscopic mechanisms involved in the cotunneling transport. DOI: 10.1103/PhysRevB.87.041302
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页数：5
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