Work

Majorana Coupling and Kondo Screening of Localized Spins

Year: 2023

Type: article

Abstract: We perform a theoretical analysis of the fate of the local magnetic moment of a quantum dot coupled to a normal metallic lead and a topological superconducting wire hosting Majorana modes at the ends. By means of simple analytical tools and numerical renormalization group calculations, we show that the proximity of the Majorana mode reduces the magnetic moment from 1/4, characteristic of a free spin 1/2, to 1/16. Coupling to the normal lead then causes the Kondo effect, such that the magnetic moment is fully screened below the Kondo temperature. The latter is vastly increased for strong coupling to Majorana mode.

Source: Acta Physica Polonica A

DOI: 10.12693/aphyspola.143.207

Authors: K.P. Wójcik, P. Majek

Institutions: Maria Curie-Skłodowska University, Institute of Molecular Physics of the Polish Academy of Sciences, Polish Academy of Sciences, Adam Mickiewicz University in Poznań

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: diamond

Funder: Alexander von Humboldt-Stiftung

OpenAlex ID: W4328138840

FWCI: 0.116

Cites: 28

Cited by: 1

Related to: 10