Broken SU(4) symmetry in a Kondo-correlated carbon nanotube

被引：39

作者：

Schmid, Daniel R. ^{[1
]}

Smirnov, Sergey ^{[2
]}

Marganska, Magdalena ^{[2
]}

Dirnaichner, Alois ^{[1
,2
]}

Stiller, Peter L. ^{[1
]}

Grifoni, Milena ^{[2
]}

Huettel, Andreas K. ^{[1
]}

Strunk, Christoph ^{[1
]}

机构：

[1] Univ Regensburg, Inst Expt & Appl Phys, D-93040 Regensburg, Germany

[2] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

来源：

PHYSICAL REVIEW B | 2015年 / 91卷 / 15期

关键词：

SPIN; TRANSPORT; ANDERSON; MODEL;

D O I：

10.1103/PhysRevB.91.155435

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Understanding the interplay between many-body phenomena and nonequilibrium in systems with entangled spin and orbital degrees of freedom is a central objective in nanoelectronics. We demonstrate that the combination of Coulomb interaction, spin-orbit coupling, and valley mixing results in a particular selection of the inelastic virtual processes contributing to the Kondo resonance in carbon nanotubes at low temperatures. This effect is dictated by conjugation properties of the underlying carbon nanotube spectrum at zero and finite magnetic field. Our measurements on a clean carbon nanotube are complemented by calculations based on a field-theoretical Keldysh approach to the nonequilibrium Kondo problem which well reproduces the rich experimental observations in Kondo transport.

引用

页数：19

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