Report

Phase Evolution in a Kondo-Correlated System

Science  27 Oct 2000:
Vol. 290, Issue 5492, pp. 779-783
DOI: 10.1126/science.290.5492.779

You are currently viewing the abstract.

View Full Text

Via your Institution

Log in through your institution

Log in through your institution


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 π 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.

  • * To whom correspondence should be addressed. E-mail: Heiblum{at}wisemail.weizmann.ac.il

View Full Text

Related Content