Scaling of the Kondo zero-bias peak in a hole quantum dot at finite temperatures

We have measured the zero-bias peak in differential conductance in a hole quantum dot. We have scaled the experimental data with applied bias and compared to real-time renormalization group calculations of the differential conductance as a function of source-drain bias in the limit of zero temperatu...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2013-05, Vol.87 (20), Article 201104
Main Authors: Klochan, O., Micolich, A. P., Hamilton, A. R., Reuter, D., Wieck, A. D., Reininghaus, F., Pletyukhov, M., Schoeller, H.
Format: Article
Language:English
Subjects:
Accuracy
Bias
Condensed matter
Conductance
Deviation
Kondo temperature
Mathematical analysis
Qunatum dots
Real time
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Summary:We have measured the zero-bias peak in differential conductance in a hole quantum dot. We have scaled the experimental data with applied bias and compared to real-time renormalization group calculations of the differential conductance as a function of source-drain bias in the limit of zero temperature and at finite temperatures. The experimental data show deviations from the T = 0 calculations at low bias, but are in very good agreement with the finite-T calculations. The Kondo temperature TK extracted from the data using T = 0 calculations, and from the peak width at [2/3] maximum, is significantly higher than that obtained from finite-T calculations.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.87.201104