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Singlet-Triplet Kondo Effect in Blatter Radical Molecular Junctions: Zero-bias Anomalies and Magnetoresistance
Gautam Mitra, Jueting Zheng, Karen Schaefer +6
The Blatter radical has been suggested as a building block in future molecular spintronic devices due to its radical character and expected long-spin lifetime. However, whether and…
Probing the spin polarization of an Anderson impurity
Mahasweta Bagchi, Tfyeche Y. Tounsi, Affan Safeer +6
We report spin-polarized scanning tunneling microscopy measurements of an Anderson impurity system in MoS mirror twin boundaries, where both the quantum confined impurity sta…
Modulated Kondo screening along magnetic mirror twin boundaries in monolayer MoS2 on graphene
Camiel van Efferen, Jeison Fischer, Theo A. Costi +3
A many-body resonance emerges at the Fermi energy when an electron bath screens the magnetic moment of a half-filled impurity level. This Kondo effect, originally introduced to exp…
Magnetic Field Universality of the Kondo Effect Revealed by Thermocurrent Spectroscopy
Chunwei Hsu, Theo A. Costi, David Vogel +4
Probing the universal low temperature magnetic field scaling of Kondo-correlated quantum dots via electrical conductance has proved to be experimentally challenging. Here, we show…
Direct measurement of the Seebeck coefficient in a Kondo-correlated single-quantum-dot transistor
B. Dutta, D. Majidi, A. Garcia Corral +5
We report on the first measurement of the Seebeck coefficient in a tunnel-contacted and gate-tunable individual single-quantum dot junction in the Kondo regime, fabricated using th…
Spin-1/2 Kondo effect in an InAs nanowire quantum dot: the Unitary limit, conductance scaling and Zeeman splitting
Andrey V. Kretinin, Hadas Shtrikman, David Goldhaber-Gordon +5
We report on a comprehensive study of spin-1/2 Kondo effect in a strongly-coupled quantum dot realized in a high-quality InAs nanowire. The nanowire quantum dot is relatively symme…
Mechanism for large thermoelectric power in negative-U molecular quantum dots
S. Andergassen, T. A. Costi, V. Zlatic
We investigate with the aid of numerical renormalization group techniques the thermoelectric properties of a molecular quantum dot described by the negative-U Anderson model. We sh…
Thermoelectric effects in correlated quantum dots and molecules
V. Schoeps, V. Zlatic, T. A. Costi
We investigate thermoelectric properties of correlated quantum dots and molecules, described by a single level Anderson model coupled to conduction electron leads, by using Wilson'…
Mechanical Control of Spin States in Spin-1 Molecules and the Underscreened Kondo Effect
J. J. Parks, A. R. Champagne, T. A. Costi +10
The ability to make electrical contact to single molecules creates opportunities to examine fundamental processes governing electron flow on the smallest possible length scales. We…
Observation of the underscreened Kondo effect in a molecular transistor
Nicolas Roch, Serge Florens, Theo A. Costi +2
We present the first quantitative experimental evidence for the underscreened Kondo effect, an uncomplete compensation of a quantized magnetic moment by conduction electrons, as or…
Magnetic Field Dependence of Dephasing Rate due to Diluted Kondo Impurities
T. Micklitz, T. A. Costi, A. Rosch
We investigate the dephasing rate, 1/tau_phi, of weakly disordered electrons due to scattering from diluted dynamical impurities. Our previous result for the weak-localization deph…
Scaling of the low temperature dephasing rate in Kondo systems
F. Mallet, J. Ericsson, D. Mailly +9
We present phase coherence time measurements in quasi-one-dimensional Ag wires doped with Fe Kondo impurities of different concentrations . Due to the relatively high Kondo te…
Universal dephasing rate due to diluted Kondo impurities
T. Micklitz, A. Altland, T. A. Costi +1
We calculate the dephasing rate due to magnetic impurities in a weakly disordered metal as measured in a weak localization experiment. If the density n_S of magnetic impurities is…
Magnetotransport through a strongly interacting quantum dot
T. A. Costi
We study the effect of a magnetic field on the conductance through a strongly interacting quantum dot by using the finite temperature extension of Wilson's numerical renormalizatio…