Mesoscopic Kondo Screening Effect in a Single-Electron Transistor Embedded in a Metallic Ring

Journal Article · Mon Jun 11 00:00:00 EDT 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.86.5558· OSTI ID:40204636

Hu, Hui; Zhang, Guang-Ming; Yu, Lu

We study the Kondo screening effect generated by a single-electron transistor or quantum dot embedded in a small metallic ring. When the ring circumference L becomes comparable to the fundamental length scale {xi}{sup 0}{sub K}={Dirac_h}{upsilon}{sub F}/ T{sup 0}{sub K} associated with the bulk Kondo temperature, the Kondo resonance is strongly affected, depending on the total number of electrons (mod4) and magnetic flux threading the ring. The resulting Kondo-assisted persistent currents are also calculated in both Kondo and mixed-valence regimes, and the maximum values are found in the crossover region.

• Sponsoring Organization: (US)
• OSTI ID: 40204636
• Journal Information: Physical Review Letters, Vol. 86, Issue 24; Other Information: DOI: 10.1103/PhysRevLett.86.5558; Othernumber: PRLTAO000086000024005558000001; 023125PRL; PBD: 11 Jun 2001; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRONS
MAGNETIC FLUX
RESONANCE
TRANSISTORS