| Grant number: | 12/02702-0 |
| Support Opportunities: | Scholarships in Brazil - Master |
| Start date: | May 01, 2012 |
| End date: | February 28, 2014 |
| Field of knowledge: | Physical Sciences and Mathematics - Physics - Condensed Matter Physics |
| Principal Investigator: | Luiz Nunes de Oliveira |
| Grantee: | Krissia de Zawadzki |
| Host Institution: | Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil |
| Associated research grant: | 07/57630-5 - Non-perturbative methods applied to strongly correlated electronic systems, AP.TEM |
Abstract We will study the longitudinal relaxation rate of a probe at a distance R from a magnetic impurity in a nonmagnetic host. A special geometry will be considered, the impurity at a distance d from the metallic surface. At low temperatures, the antiferromagnetic interaction between the impurity and the conduction electron gives rise to the Kondo effect, a narrow resonance centered at the Fermi level. On intuitive grounds, we expect the relaxation rate to depend on the ratio between d and R and hence to give direct information on the spatial structure of the screening cloud around the impurity. | |
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