Quantum Dots with Even Number of Electrons: Kondo Effect in a Finite Magnetic Field

1999/08/31 by M. Pustilnik, Y. Avishai, K. Kikoin · 7 citations
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.84.1756

published as Phys. Rev. Lett. 84, 1756 (2000)

arxiv created 1999/10/18 · openalex publication_date 2000/02/21 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We show that the Kondo effect can be induced by an external magnetic field in quantum dots with an even number of electrons. If the Zeeman energy B is close to the single-particle level spacing Delta in the dot, the scattering of the conduction electrons from the dot is dominated by an anisotropic exchange interaction. A Kondo resonance then occurs despite the fact that B exceeds by far the Kondo temperature T(K). As a result, at low temperatures T<<T(K) the differential conductance approaches a unitary limit G(K) approximately e(2)/piPlanck's over 2pi. A possible experimental realization of this effect is discussed.

Citations

• Low Temperature Transport through a Quantum Dot: The Anderson Model out of Equilibrium
• Resistance Minimum in Dilute Magnetic Alloys
• A ?fermi-liquid? description of the Kondo problem at low temperatures

Cited by

• Kondo shuttling in a nanoelectromechanical single-electron transistor
• Kondo effect in coupled quantum dots with RKKY interaction: Effects of finite temperature and magnetic field
• Kondo effect in quantum dots
• Ruderman-Kittel-Kasuya-Yosida and Magnetic-Field Interactions in Coupled Kondo Quantum Dots
• Singular or non-Fermi liquids
• Enhancement of Kondo Effect in Multilevel Quantum Dots
• Quantum transport in carbon nanotubes