Magnetic noise due to Kondo impurities in spintronic devices

• Grant number: 13/50220-7
• Support Opportunities: Regular Research Grants
• Start date: July 01, 2013
• End date: June 30, 2015
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Agreement: University of Victoria
• Principal Investigator: Luis Gregório Godoy de Vasconcellos Dias da Silva
• Grantee: Luis Gregório Godoy de Vasconcellos Dias da Silva
• Principal researcher abroad: Rogério de Sousa
• Institution abroad: University of Victoria (UVic) , Canada
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• City of the host institution: São Paulo
• Associated research grant: 10/20804-9 - Electronic correlations and real-time dynamics in nanostructures: a computational approach, AP.R

Abstract

Conventional electronic devices based on charge currents are reaching their limit both in terms of miniaturization as well as energy dissipation. This realization has motivated research on spintronic devices that are based on the electron spin degree of freedom. Spintronic devices are more sensitive to environmental fluctuations, because, in addition to charge noise, they are also sensitive to magnetic or spin noise. Research on the magnetic noise affecting spintronic devices is still at its infancy, and has been a central theme of Prof. de Sousa's research group. Here we propose to investigate the magnetic noise problem due to a Kondo impurity. The dynamics of a Kondo impurity is a complicated many body problem, whose solution requires the use of the modem numerical renormalization-group method, a technique in which Prof. Dias is a world-class expert. This proposal aims to bring together this unique combination of skills to establish a strategic collaboration between Prof. de Sousa's group, specializing in spintronic devices, and Prof. Dias' group, specializing in the computational solution of many body problems. The outcome of this collaboration will be the solution of a timely and important problem. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DIAS DA SILVA, LUIS G. G. V.; DE SOUSA, ROGERIO. Spin versus charge noise from Kondo traps. Physical Review B, v. 92, n. 8, AUG 14 2015. (13/50220-7)

DIAS DA SILVA, LUIS G. G. V.; DE SOUSA, ROGERIO. Spin versus charge noise from Kondo traps. Physical Review B, v. 92, n. 8, p. 8-pg., 2015-08-14. (13/50220-7)