Transport through a quantum dot with SU(4) Kondo entanglement

2006/09/12 by Karyn Le Hur, K. Le Hur, P. Simon +3
Engineering · Physics and Astronomy · #Molecular Junctions and Nanostructures #Quantum and electron transport phenomena #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.75.035332

published as Phys. Rev. B 75, 035332 (2007) · 13 pages, 3 figures

arxiv created 2006/09/12 · openalex publication_date 2007/01/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We investigate a mesoscopic setup composed of a small electron droplet (dot) coupled to a larger quantum dot (grain) also subject to Coulomb blockade as well as two macroscopic leads used as source and drain. An exotic Kondo ground state other than the standard SU(2) Fermi liquid unambiguously emerges: an SU(4) Kondo correlated liquid. The transport properties through the small dot are analyzed for this regime, through boundary conformal field theory, and allow a clear distinction with other regimes such as a two-channel spin state or a two-channel orbital state.

Citations

• Maximized orbital and spin Kondo effects in a single-electron transistor
• Kondo effect and spin filtering in triangular artificial atoms
• Coulomb blockade and non-Fermi-liquid behavior in quantum dots
• Orbital Kondo effect in carbon nanotubes
• Enhancement of the two-channel Kondo effect in single-electron boxes
• Multiple Andreev Reflections in a Carbon Nanotube Quantum Dot
• Quantum Phase Transition in Capacitively Coupled Double Quantum Dots
• A ?fermi-liquid? description of the Kondo problem at low temperatures