Abstract
We measured the phase evolution of electrons as they traverse a quantum dot (QD) formed in a two-dimensional electron gas that serves as a localized spin. The traversal phase, determined by embedding the QD in a double path electron interferometer and measuring the quantum interference of the electron wave functions manifested by conductance oscillation as a function of a weak magnetic field, evolved by radians, a range twice as large as theoretically predicted. As the correlation weakened, a gradual transition to the familiar phase evolution of a QD was observed. The specific phase evolution observed is highly sensitive to the onset of Kondo correlation, possibly serving as an alternative fingerprint of the Kondo effect.
| Original language | English |
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| Pages (from-to) | 353-360 |
| Number of pages | 8 |
| Journal | Electronic Correlations: From Meso- To Nano-Physics |
| Publication status | Published - 2001 |
| Event | 36th Rencontres de Moriond on Electronic Correlations - Savoie, FRANCE Duration: 20 Jan 2001 → 27 Jan 2001 |