Published in
American Physical Society, Physical Review Letters, 12(113)
DOI: 10.1103/physrevlett.113.126601
Links
- ORCID
- ORCID
- American Physical Society
- [hal.archives-ouvertes.fr]
- [arxiv.org] | PDF
- [arxiv.org] | PDF
- [www.researchgate.net] | PDF
- [repository.dl.itc.u-tokyo.ac.jp] | PDF
Tools
Transmission Phase in the Kondo Regime Revealed in a Two-Path Interferometer
,
C. Bäuerle,
M. Yamamoto,
K. Watanabe,
S. Hermelin,
T. Meunier,
A. Alex,
J. von Delft,
A. Weichselbaum,
A. Ludwig ,
A. D D. Wieck,
S. Tarucha
Full text: Download
Abstract
We report on the direct observation of the transmission phase shift through a Kondo correlated quantum dot by employing a new type of two-path interferometer. We observed a clear $π/2$-phase shift, which persists up to the Kondo temperature $T_{\rm K}$. Above this temperature, the phase shifts by more than $π/2$ at each Coulomb peak, approaching the behavior observed for the standard Coulomb blockade regime. These observations are in remarkable agreement with 2-level numerical renormalization group calculations. The unique combination of experimental and theoretical results presented here fully elucidates the phase evolution in the Kondo regime. ; Comment: 4 pages, 3 figures