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Intermediate Low Spin States in a Few-electron Quantum Dot in the Regime
Y. Nishi, P. A. Maksym, D. G. Austing +4
We study the effects of electron-electron interactions in a circular few-electron vertical quantum dot in such a strong magnetic field that the filling factor . We measure…
Shot Noise Detection on a Carbon Nanotube Quantum Dot
E. Onac, F. Balestro, B. Trauzettel +2
An on-chip detection scheme for high frequency signals is used to detect noise generated by a quantum dot formed in a single wall carbon nanotube. The noise detection is based on p…
Control and Detection of Singlet-Triplet Mixing in a Random Nuclear Field
F. H. L. Koppens, J. A. Folk, J. M. Elzerman +7
We observe mixing between two-electron singlet and triplet states in a double quantum dot, caused by interactions with nuclear spins in the host semiconductor. This mixing is suppr…
Tunable Supercurrent Through Semiconductor Nanowires
Yong-Joo Doh, Jorden A. van Dam, Aarnoud L. Roest +3
Nanoscale superconductor-semiconductor hybrid devices are assembled from InAs semiconductor nanowires individually contacted by aluminum-based superconductor electrodes. Below 1 K,…
The Kondo Effect in the Presence of Magnetic Impurities
H. B. Heersche, Z. de Groot, J. A. Folk +5
We measure transport through gold grain quantum dots fabricated using electromigration, with magnetic impurities in the leads. A Kondo interaction is observed between dot and leads…
Spin filling of a quantum dot derived from excited-state spectroscopy
L. H. Willems van Beveren, R. Hanson, I. T. Vink +3
We study the spin filling of a semiconductor quantum dot using excited-state spectroscopy in a strong magnetic field. The field is oriented in the plane of the two-dimensional elec…
Orbital Kondo effect in carbon nanotubes
Pablo Jarillo-Herrero, Jing Kong, Herre S. J. van der Zant +3
Progress in the fabrication of nanometer-scale electronic devices is opening new opportunities to uncover the deepest aspects of the Kondo effect, one of the paradigmatic phenomena…