Kondo lattice mediated interactions in flat-band systems

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-12
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Language
en
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9
1-9
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PHYSICAL REVIEW RESEARCH, Volume 3, issue 4
Abstract
Electronic flat bands represent a paradigmatic platform to realize strongly correlated matter due to their associated divergent density of states. In common instances, including electron-electron interactions leads to magnetic instabilities for repulsive interactions and superconductivity for attractive interactions. Nevertheless, interactions of a Kondo nature in flat-band systems have remained relatively unexplored. Here we address the emergence of interacting states mediated by Kondo lattice coupled to a flat-band system. Combining dynamical mean-field theory and tensor networks methods to solve flat-band Kondo lattice models in one and two dimensions, we show the emergence of a robust underscreened regime leading to a magnetically ordered state in the flat band. Our results put forward flat-band Kondo lattice models as a platform to explore the genuine interplay between flat-band physics and many-body Kondo screening.
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Kumar, P, Chen, G & Lado, J 2021, ' Kondo lattice mediated interactions in flat-band systems ', PHYSICAL REVIEW RESEARCH, vol. 3, no. 4, 043113, pp. 1-9 . https://doi.org/10.1103/PhysRevResearch.3.043113