Kondo time scales for quantum dots: Response to pulsed bias potentials

Journal Article · Mon May 15 00:00:00 EDT 2000 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.61.R13341· OSTI ID:20216567

Plihal, Martin ^[1]; Langreth, David C ^[1]; Nordlander, Peter ^[2]

---

1. Center for Materials Theory, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854-8019 (United States)
2. Department of Physics and Rice Quantum Institute, Rice University, Houston, Texas 77251-1892 (United States)

The response of a quantum dot in the Kondo regime to rectangular pulsed bias potentials of various strengths and durations is studied theoretically. It is found that the rise time is faster than the fall time, and also faster than time scales normally associated with the Kondo problem. For larger values of the pulsed bias, one can induce dramatic oscillations in the induced current with a frequency approximating the splitting between the Kondo peaks that would be present in steady state. The effect persists in the total charge transported per pulse, which should facilitate the experimental observation of the phenomenon. (c) 2000 The American Physical Society.

• OSTI ID: 20216567
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 61, Issue 20; Other Information: PBD: 15 May 2000; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
KONDO EFFECT
SEMICONDUCTOR JUNCTIONS
ELECTRIC CONDUCTIVITY
THEORETICAL DATA