Measurement of Quantum Noise in a Carbon Nanotube Quantum Dot in the Kondo Regime

被引：52

作者：

Basset, J. ^{[1
]}

Kasumov, A. Yu. ^{[1
]}

Moca, C. P. ^{[2
,3
]}

Zarand, G. ^{[2
,4
]}

Simon, P. ^{[1
]}

Bouchiat, H. ^{[1
]}

Deblock, R. ^{[1
]}

机构：

[1] Univ Paris 11, CNRS, Phys Solides Lab, UMR 8502, F-91405 Orsay, France

[2] Budapest Univ Technol & Econ, Inst Phys, BME MTA Exot Quantum Phase Grp, H-1521 Budapest, Hungary

[3] Univ Oradea, Dept Phys, Oradea 410087, Romania

[4] Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 04期

关键词：

MAGNETIC-ALLOYS;

D O I：

10.1103/PhysRevLett.108.046802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The current emission noise of a carbon nanotube quantum dot in the Kondo regime is measured at frequencies nu of the order or higher than the frequency associated with the Kondo effect k(B)T(K)/h, with T-K the Kondo temperature. The carbon nanotube is coupled via an on-chip resonant circuit to a quantum noise detector, a superconductor-insulator-superconductor junction. We find for h nu approximate to k(B)T(K) a Kondo effect related singularity at a voltage bias eV approximate to h nu, and a strong reduction of this singularity for h nu approximate to 3k(B)T(K), in good agreement with theory. Our experiment constitutes a new original tool for the investigation of the nonequilibrium dynamics of many-body phenomena in nanoscale devices.

引用

页数：5

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