Anomalous Kondo effect in a quantum dot at nonzero bias

Authors
Simmel, F Blick, RH Kotthaus, JP Wegscheider, W Bichler, M
Citation
F. Simmel et al., Anomalous Kondo effect in a quantum dot at nonzero bias, PHYS REV L, 83(4), 1999, pp. 804-807
Citations number
16
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
4
Year of publication
1999
Pages
804 - 807
Database
ISI
SICI code
0031-9007(19990726)83:4<804:AKEIAQ>2.0.ZU;2-L
Abstract
We present measurements on the Kondo effect in a small quantum dot connecte d strongly to one lead and weakly to the other. The conductance of the dot reveals an offset of the Kondo resonance at zero magnetic held. While the r esonance persists in the negative bias regime, it is suppressed in the oppo site direction. This demonstrates the pinning of the Kondo resonance to the Fermi levels of the leads.