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Title: Observation of the Kondo effect in a spin-3/2 hole quantum dot

Abstract

We report the observation of the Kondo effect in a spin-3/2 hole quantum dot formed near pinch-off in a GaAs quantum wire. We clearly observe two distinctive hallmarks of quantum dot Kondo physics. First, the zero-bias peak in the differential conductance splits an in-plane magnetic field and the splitting is independent of gate voltage. Second, the splitting rate is twice as large as that for the lowest one-dimensional subband. We show that the Zeeman splitting of the zero-bias peak is highly anisotropic and attribute this to the strong spin-orbit interaction for holes in GaAs.

Authors:
; ;  [1]; ; ;  [2]
  1. School of Physics, University of New South Wales, Sydney NSW 2052 (Australia)
  2. Angewandte Festkörperphysik, Ruhr-Universität Bochum, D-44780 Bochum (Germany)
Publication Date:
OSTI Identifier:
22261852
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1566; Journal Issue: 1; Conference: ICPS 2012: 31. international conference on the physics of semiconductors, Zurich (Switzerland), 29 Jul - 3 Aug 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ANISOTROPY; ELECTRIC POTENTIAL; GALLIUM ARSENIDES; KONDO EFFECT; L-S COUPLING; MAGNETIC FIELDS; QUANTUM DOTS; QUANTUM WIRES; ZEEMAN EFFECT

Citation Formats

Klochan, O., Micolich, A. P., Hamilton, A. R., Trunov, K., Reuter, D., and Wieck, A. D. Observation of the Kondo effect in a spin-3/2 hole quantum dot. United States: N. p., 2013. Web. doi:10.1063/1.4848430.
Klochan, O., Micolich, A. P., Hamilton, A. R., Trunov, K., Reuter, D., & Wieck, A. D. Observation of the Kondo effect in a spin-3/2 hole quantum dot. United States. https://doi.org/10.1063/1.4848430
Klochan, O., Micolich, A. P., Hamilton, A. R., Trunov, K., Reuter, D., and Wieck, A. D. 2013. "Observation of the Kondo effect in a spin-3/2 hole quantum dot". United States. https://doi.org/10.1063/1.4848430.
@article{osti_22261852,
title = {Observation of the Kondo effect in a spin-3/2 hole quantum dot},
author = {Klochan, O. and Micolich, A. P. and Hamilton, A. R. and Trunov, K. and Reuter, D. and Wieck, A. D.},
abstractNote = {We report the observation of the Kondo effect in a spin-3/2 hole quantum dot formed near pinch-off in a GaAs quantum wire. We clearly observe two distinctive hallmarks of quantum dot Kondo physics. First, the zero-bias peak in the differential conductance splits an in-plane magnetic field and the splitting is independent of gate voltage. Second, the splitting rate is twice as large as that for the lowest one-dimensional subband. We show that the Zeeman splitting of the zero-bias peak is highly anisotropic and attribute this to the strong spin-orbit interaction for holes in GaAs.},
doi = {10.1063/1.4848430},
url = {https://www.osti.gov/biblio/22261852}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1566,
place = {United States},
year = {Wed Dec 04 00:00:00 EST 2013},
month = {Wed Dec 04 00:00:00 EST 2013}
}