Work

Tunable Kondo screening in a quantum dot device

Year: 2005

Type: article

Abstract: We consider electron transport along a single-mode channel which is in contact, via tunnel junctions in its walls, with two quantum dots. Electron tunneling to and from the dots contributes to the electron backscattering, and thus modifies the channel conductance. If the dots carry spin, the channel conductance becomes temperature dependent due to the Kondo effect. The two-dot device geometry allows for a formation of $S=1$ localized spin due to the indirect exchange interaction, called Ruderman-Kittel-Kasuya-Yosida interaction. This device offers a possibility to study the crossover between fully screened and underscreened Kondo impurity. We investigate the manifestation of such crossover in the channel conductance.

Source: Physical Review B

DOI: 10.1103/physrevb.72.121308

Authors: Hiroyuki Tamura, Leonid Glazman

Institutions: NTT (Japan), Japan Science and Technology Agency, NTT Basic Research Laboratories, University of Minnesota

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2030811537

FWCI: 2.271

Cites: 35

Cited by: 18

Related to: 10