Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session C16: Transport in Nanostructures -- Quantum dots, nanocrystals, and nanowires
2:30 PM–5:30 PM,
Monday, March 4, 2019
BCEC
Room: 155
Sponsoring
Unit:
DMP
Chair: Jeremy Levy, University of Pittsburgh
Abstract: C16.00009 : Measurement of the Kondo cloud length via a quantum dot coupled to a 1d interferometer: Experiment (2/2)
4:30 PM–4:42 PM
Presenter:
Ivan Borzenets
(Physics, City University of Hong Kong)
Authors:
Ivan Borzenets
(Physics, City University of Hong Kong)
Jeongmin Shim
(Physics, Korea Advanced Institute of Science and Technology)
Jason Chen
(Applied Physics, The University of Tokyo)
H.-S. Sim
(Physics, Korea Advanced Institute of Science and Technology)
Michihisa Yamamoto
(CEMS, RIKEN)
Seigo Tarucha
(CEMS, RIKEN)
Collaboration:
Ivan Borzenets
In this work, we perform direct experimental measurement of the Kondo cloud length ξK by coupling a Kondo correlated quantum dot to ballistic, multi-channel quantum wires, one of which couples more strongly to the dot and works as a 1D Fabry–Perot (F-P) interferometer defined on a GaAs/AlGaAs heterostructure. We demonstrate that the measured Kondo temperature undergoes resonances with respect to the F-P fluctuations. By looking at the strength of the resonances versus the interferometer lengths, we are able to access the length of the Kondo cloud. We back up our results by comparing the behavior of the interferometer in the Kondo as well as the Coulomb Blockade Regimes.
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