Do Van Hove Singularities in Leads Influence Tunneling Current through Quantum Dot?

• Authors: M. Krawiec , T. Domański , K. Wysokiński
• Languages of publication: EN

Abstracts

EN

Using the Landauer type formula for the current through quantum dot we have studied the influence of the singularities in the density of states in leads on the differential conductance of the system and answered affirmatively the above question. The presence of Van Hove singularities in the leads may induce an additional structure on the conductance vs. voltage curve. The dot itself has been described by the single impurity Anderson model with a very strong "on-dot" Coulomb repulsion. We also simulate the effect of electron-phonon interaction in the dot by allowing for the fluctuations of the "impurity" energy level.

Keywords

EN

73.40.Gk; 72.15.Qm; 71.27.+a

Discipline

• 72.15.Qm: Scattering mechanisms and Kondo effect(see also 75.20.Hr Local moments in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions in magnetic properties and materials)
• 71.27.+a: Strongly correlated electron systems; heavy fermions
• 73.40.Gk: Tunneling(for tunneling in quantum Hall effects, see 73.43.Jn)

• Journal: Acta Physica Polonica A
• Year: 1998
• Volume: 94
• Issue: 3
• Pages: 411-414

Dates

published

1998-09

Contributors

author

M. Krawiec

• Institute of Physics, Maria Curie-Skłodowska University, Radziszewskiego 10 A, 20-031 Lublin, Poland

author

T. Domański

• Institute of Physics, Maria Curie-Skłodowska University, Radziszewskiego 10 A, 20-031 Lublin, Poland

author

K. Wysokiński

• Institute of Physics, Maria Curie-Skłodowska University, Radziszewskiego 10 A, 20-031 Lublin, Poland

Identifiers

DOI

10.12693/APhysPolA.94.411