Comment on "Josephson Current through a Nanoscale Magnetic Quantum Dot"

Abstract

In a recent work [Phys. Rev. Lett. 93, 047002 (2004)], Siano and Egger (SE) studied Josephson current through a quantum dot in the Kondo regime using the quantum Monte Carlo (QMC) method. Several of their results were inconsistent with those from the numerical renormalization group (NRG) calculations [Phys. Rev. B 70, R020502 (2004); J. Phys. Soc. Jpn. 69, 1812 (2000)] among other previous studies. The results of SE are not reliable for the following two reasons: (i) The definition of the Kondo temperature was not correct; (ii) There were substantial fintie-temperature effects.

References in corpus (3)

• The Kondo Effect in the Unitary Limit
• Kondo Effect and Josephson Current through a Quantum Dot between Two Superconductors
• Josephson current through a nanoscale magnetic quantum dot

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• Josephson current in strongly correlated double quantum dots
• Josephson current through a Kondo molecule
• Practical Guide to Quantum Phase Transitions in Quantum-Dot-Based Tunable Josephson Junctions
• Andreev Bound States in the Kondo Quantum Dots Coupled to Superconducting Leads
• Non-equilibrium transport through a Josephson quantum dot
• Mixed-Valence Transition on a Quantum-Dot Coupled to Superconducting and Spin-Polarized Leads