Regensburg 2019 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 52: Quantum Impurities and Kondo Physics

TT 52.3: Talk

Thursday, April 4, 2019, 10:00–10:15, H7

Conductance of a molecular double-quantum dot in the Kondo regime: Effects of the Dzyaloshinskii-Moryia interaction — •Peter Zalom, Richard Korytár, and Tomáš Novotný — Charles University, Prague, Czech Republic

Motivated by a recent experiment in a molecular junction [1], we investigate a double-dot singlet-triplet model in the Coulomb blockade by the means of a numerical renormalization group. We confirm that the magnetic-field induced degeneracy leads to a Kondo effect [2], which is perturbatively stable when Dzyaloshinskii-Moryia interaction (DMI) is included. Strong DMI suppresses the Kondo resonance in the differential conductance and leads to a non-trivial temperature dependence.
M. Koole, J. C. Hummelen, H. S. van der Zant, Phys. Rev. B 94, 165414 (2016)
M. Pustilnik, L. Glazman, Phys. Rev. B 64, 045328 (2001)