Conductance-Driven Change of the Kondo Effect in a Single Cobalt Atom
Abstract
A low-temperature scanning tunneling microscope is employed to build a junction comprising a Co atom bridging a copper-coated tip and a Cu(100) surface. An Abrikosov-Suhl-Kondo resonance is evidenced in the differential conductance and its width is shown to vary exponentially with the ballistic conductance for all tips employed. Using a theoretical description based on the Anderson model, we show that the Kondo effect and the total conductance are related through the atomic relaxations affecting the environment of the Co atom.
- Publication:
-
Physical Review Letters
- Pub Date:
- June 2012
- DOI:
- arXiv:
- arXiv:1112.2858
- Bibcode:
- 2012PhRvL.108z6803C
- Keywords:
-
- 73.63.Rt;
- 68.37.Ef;
- 72.15.Qm;
- 73.20.Fz;
- Nanoscale contacts;
- Scanning tunneling microscopy;
- Scattering mechanisms and Kondo effect;
- Weak or Anderson localization;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Materials Science;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 5 pages, 4 figures, final version