Tunable Kondo Physics in a Carbon Nanotube Double Quantum Dot

被引：32

作者：

Chorley, S. J. ^{[1
]}

Galpin, M. R. ^{[2
]}

Jayatilaka, F. W. ^{[2
]}

Smith, C. G. ^{[1
]}

Logan, D. E. ^{[2
]}

Buitelaar, M. R. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Univ Oxford, Dept Chem, Phys & Theoret Chem Lab, Oxford OX1 3QZ, England

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 15期

基金：

英国工程与自然科学研究理事会;

关键词：

METALS; STATES; FIELD; IMPURITIES; TRANSITION; MOLECULE; SYSTEM; POINT; MODEL;

D O I：

10.1103/PhysRevLett.109.156804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate a tunable two-impurity Kondo system in a strongly correlated carbon nanotube double quantum dot, accessing the full range of charge regimes. In the regime where both dots contain an unpaired electron, the system approaches the two-impurity Kondo model. At zero magnetic field the interdot coupling disrupts the Kondo physics and a local singlet state arises, but we are able to tune the crossover to a Kondo screened phase by application of a magnetic field. All results show good agreement with a numerical renormalization group study of the device.

引用

页数：5

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