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Transmission Phase in the Kondo Regime Revealed in a Two-Path Interferometer
Takada, S.
2370
Bäuerle, C.
2371
Yamamoto, M.
2372
Watanabe, K.
2373
Hermelin, S.
2374
Meunier, T.
2375
Alex, A.
2376
Weichselbaum, A.
2377
von, Delft J.
2378
Ludwig, A.
2379
Wieck, A. D.
2380
Tarucha, S.
2381
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 TK. 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 two-level numerical renormalization group calculations. The unique combination of experimental and theoretical results presented here fully elucidates the phase evolution in the Kondo regime.
UTokyo Research掲載「近藤状態によって散乱される電子波の位相のずれを初めて観測」 URI: http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/first-observation-of-phase-shift-of-an-electron-wave-function-scattered-off-a-kondo-state/
UTokyo Research "First observation of phase shift of an electron wave function scattered off a Kondo state" URI: http://www.u-tokyo.ac.jp/en/utokyo-research/research-news/first-observation-of-phase-shift-of-an-electron-wave-function-scattered-off-a-kondo-state/
journal article
American Physical Society
2014-09-15
application/pdf
Physical Review Letters
12
113
126601
AA00773679
0031-9007
1079-7114
https://repository.dl.itc.u-tokyo.ac.jp/record/667/files/PhysRevLett.113.126601.pdf
eng
info:doi/10.1103/PhysRevLett.113.126601
http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/first-observation-of-phase-shift-of-an-electron-wave-function-scattered-off-a-kondo-state/
http://www.u-tokyo.ac.jp/en/utokyo-research/research-news/first-observation-of-phase-shift-of-an-electron-wave-function-scattered-off-a-kondo-state/
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.113.126601
© 2014 American Physical Society