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Journal articles
Kondo screening by the surface modes of a strong topological insulator
Abstract : 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.
Cited literature [55 references]
https://hal-ens-lyon.archives-ouvertes.fr/ensl-00842732
Contributor : Edmond Orignac Connect in order to contact the contributor
Submitted on : Thursday, March 8, 2018 - 12:28:30 PM
Last modification on : Tuesday, December 21, 2021 - 3:34:05 PM
Long-term archiving on: : Saturday, June 9, 2018 - 2:06:01 PM
Contributor : Edmond Orignac Connect in order to contact the contributor
Submitted on : Thursday, March 8, 2018 - 12:28:30 PM
Last modification on : Tuesday, December 21, 2021 - 3:34:05 PM
Long-term archiving on: : Saturday, June 9, 2018 - 2:06:01 PM
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OrignacPRB2013.pdf
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