Phase evolution in a Kondo-correlated system

被引：231

作者：

Ji, Y ^{[1
]}

Heiblum, M ^{[1
]}

Sprinzak, D ^{[1
]}

Mahalu, D ^{[1
]}

Shtrikman, H ^{[1
]}

机构：

[1] Weizmann Inst Sci, Braun Ctr Submicron Res, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel

来源：

SCIENCE | 2000年 / 290卷 / 5492期

关键词：

D O I：

10.1126/science.290.5492.779

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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 pi 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.

引用

页码：779 / 783

页数：5

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