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

Abstract

Understanding the interplay between many-body phenomena and non-equilibrium in systems with entangled spin and orbital degrees of freedom is a central objective in nano-electronics. 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 new approach to the non-equilibrium Kondo problem which well reproduces the rich experimental observations in Kondo transport.

8 pages, 6 figures; appendix of 14 pages, 7 figures

References in corpus (13)

• Spin-orbit coupling in curved graphene, fullerenes, nanotubes, and nanotube caps
• Coupling of Spin and Orbital Motion of Electrons in Carbon Nanotubes
• Strong coupling between single-electron tunneling and nano-mechanical motion
• Orbital Kondo effect in carbon nanotubes
• Universal Scaling in Non-equilibrium Transport Through a Single-Channel Kondo Dot
• Nonequilibrium Singlet-Triplet Kondo Effect in Carbon Nanotubes
• Large spin-orbit coupling in carbon nanotubes
• SU(4) and SU(2) Kondo Effects in Carbon Nanotube Quantum Dots
• Kondo Effects in Carbon Nanotubes: From SU(4) to SU(2) symmetry
• Kondo effect in carbon nanotube quantum dots with spin-orbit coupling
• Magnetic damping of a carbon nanotube NEMS resonator
• Magnetic-Field Dependence of Tunnel Couplings in Carbon Nanotube Quantum Dots
• Keldysh effective action theory for universal physics in spin-1/2 Kondo dots

Cited by in corpus (35)

• Quantum transport in carbon nanotubes
• Advances and challenges in single-molecule electron transport
• Universality of Non-equilibrium Fluctuations in Strongly Correlated Quantum Liquids
• Manipulating the magnetic state of a carbon nanotube Josephson junction using the superconducting phase
• Angular momentum and topology in semiconducting single-wall carbon nanotubes
• Shaping electron wave functions in a carbon nanotube with a parallel magnetic field
• Nanomechanical characterization of the Kondo charge dynamics in a carbon nanotube
• Valley coupling in finite-length metallic single-wall carbon nanotubes
• Transport across a carbon nanotube quantum dot contacted with ferromagnetic leads: experiment and non-perturbative modeling
• Thermoelectric Transport through SU(N) Kondo Impurity
• The two classes of low energy spectra in finite carbon nanotubes
• Blocking transport resonances via Kondo entanglement in quantum dots
• Wigner crystal phases in confined carbon nanotubes
• Fabry-Pérot oscillations in correlated carbon nanotubes
• Spin-isospin Kondo effects for ${\Sigma }_c$ and ${\Sigma }_c^{\ast }$ baryons and $\bar{D}$ and ${\bar{D}}^{\ast }$ mesons
• Spin-orbital and spin Kondo effects in parallel coupled quantum dots
• Secondary electron interference from trigonal warping in clean carbon nanotubes
• Kondo effect in a carbon nanotube with spin-orbit interaction and valley mixing: A DM-NRG study
• Field-induced SU(4) to SU(2) Kondo crossover in a half-filling nanotube dot: spectral and finite-temperature properties
• Feynman-Vernon influence functional approach to quantum transport in interacting nanojunctions: An analytical hierarchical study
• Co-sputtered MoRe thin films for carbon nanotube growth-compatible superconducting coplanar resonators
• Liquid-induced damping of mechanical feedback effects in single electron tunneling through a suspended carbon nanotube
• Non-collinear spin-orbit magnetic fields in a carbon nanotube double quantum dot
• Field-Enhanced Kondo Correlations in a Half-Filling Nanotube Dot: Evolution of an SU(N) Fermi-Liquid Fixed Point
• Metallic Carbon Nanotube Quantum Dots with Broken Symmetries as a Platform for Tunable Terahertz Detection
• Quartz tuning-fork based carbon nanotube transfer into quantum device geometries
• Intra- and inter-shell Kondo effects in carbon nanotube quantum dots
• Towards carbon nanotube growth into superconducting microwave resonator geometries
• Magnetic field control of the Franck-Condon coupling of few-electron quantum states
• Carbon Nanotube Millikelvin Transport and Nanomechanics
• Incipient singlet-triplet states in a hybrid mesoscopic system
• From Transparent Conduction to Coulomb Blockade at Fixed Hole Number
• Unhiding a concealed resonance by multiple Kondo transitions in a quantum dot
• Coupling of shells in a carbon nanotube quantum dot
• Fractional shot noise of an SU(N) Kondo system