Journal
PHYSICAL REVIEW LETTERS
Volume 111, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.136803
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Funding
- ANR-PNANO Project Mol-NanoSpin [ANR-08-NANO-002]
- ERC Advanced Grant MolNanoSpin [226558]
- European Research Council (ERC) [226558] Funding Source: European Research Council (ERC)
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We report on cotunneling spectroscopy magnetoconductance measurements of multihole ultraclean carbon nanotube quantum dots in the SU(4) Kondo regime with strong spin-orbit coupling. Successive shells show a gradual weakening of the Kondo effect with respect to the spin-orbital splittings, leading to an evolution from SU(4) to SU(2) symmetry with a suppressed conductance at half-shell filling. The extracted energy level spectrum, overall consistent with negligible disorder in the nanotube, shows in the half filled case large renormalizations due to Coulombian effects.
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