Mott to Kondo transition in Kondo lattices
Lead Research Organisation:
King's College London
Department Name: Physics
Abstract
Recent experiments preformed on the deposition of f elements upon metallic substrates have generated a tremendous interest in the scientific community due to the resultant self-assembled f element superlattices. In particular, this has opened avenues towards an experimental realization of Kondo lattices.
A number of self-assembled structures have been discovered, however no clear theoretical description has so far provided a classification of the Mott and Kondo physics of the experiments. In this work we provide a general phase diagram of correlated super-structures as a function of correlation strength, substrate electronic density, and adatom inter-distances. Through the use of state-of-the-art dynamical mean-field theory calculations at finite temperature, we have identified a clear regime of parameters where Kondo lattices can be realised. We also report a sharp transition between Mott type physics (for short adatom inter-distances) and Kondo physics. We also report the stabilization of a charge density wave competing with Kondo physics at large inter-adatom distances. Finally, for half-filled f occupation the ionic potential of the f element induces a non trivial bound state between the f and substrate electrons, which in turn is unaffected by the local many-body effects present within the f-shell.
A number of self-assembled structures have been discovered, however no clear theoretical description has so far provided a classification of the Mott and Kondo physics of the experiments. In this work we provide a general phase diagram of correlated super-structures as a function of correlation strength, substrate electronic density, and adatom inter-distances. Through the use of state-of-the-art dynamical mean-field theory calculations at finite temperature, we have identified a clear regime of parameters where Kondo lattices can be realised. We also report a sharp transition between Mott type physics (for short adatom inter-distances) and Kondo physics. We also report the stabilization of a charge density wave competing with Kondo physics at large inter-adatom distances. Finally, for half-filled f occupation the ionic potential of the f element induces a non trivial bound state between the f and substrate electrons, which in turn is unaffected by the local many-body effects present within the f-shell.
Organisations
People |
ORCID iD |
Cedric Weber (Primary Supervisor) | |
Hovan Lee (Student) |
Publications

Lee H
(2019)
The Mott to Kondo transition in diluted Kondo superlattices
in Communications Physics
Studentship Projects
Project Reference | Relationship | Related To | Start | End | Student Name |
---|---|---|---|---|---|
EP/N509498/1 | 30/09/2016 | 29/09/2021 | |||
1949871 | Studentship | EP/N509498/1 | 30/09/2017 | 28/02/2022 | Hovan Lee |
EP/R513064/1 | 30/09/2018 | 29/09/2023 | |||
1949871 | Studentship | EP/R513064/1 | 30/09/2017 | 28/02/2022 | Hovan Lee |