ORIGNAC, Edmond; BURDIN, Sébastien

doi:10.1103/PhysRevB.88.035411

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ORIGNAC, Edmond
Laboratoire de Physique de l'ENS Lyon [Phys-ENS]

BURDIN, Sébastien
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

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Article de revue

Este ítem está publicado en

Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2013-07-15, vol. 88, n° 3, p. 035411 (1-17)

American Physical Society

Resumen en inglés

We consider a magnetic impurity deposited on the surface of a strong topological insulator and interacting with the surface modes by a Kondo exchange interaction. Taking into account the warping of the Fermi line of the surface modes, we derive a mapping to an effective one-dimensional model and show that the impurity is fully screened by the surface electrons except when the Fermi level lies exactly at the Dirac point. Using an Abrikosov fermion mean-field theory, we calculate the shape of the electronic density Friedel oscillation resulting from the presence of the Kondo screening cloud. We analyze quantitatively the observability of a sixfold symmetry in the Friedel oscillations for two prototype compounds: Bi2Se3 and Bi2Te3.< Leer menos

Palabras clave

Isolants topologiques

états de surface

effet Kondo

oscillations de Friedel

Palabras clave en inglés

Topological insulators

surface modes

Kondo screening

Friedel oscillations

DOI

http://dx.doi.org/10.1103/PhysRevB.88.035411

Proyecto ANR

Transport électronique dans les isolants topologiques - ANR-10-BLAN-0419

Orígen

Importado de Hal

Centros de investigación

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798