Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session T19: Strong Electronic Correlations in Topological Materials: Theory
11:30 AM–2:06 PM,
Thursday, March 9, 2023
Room: Room 211
Sponsoring
Unit:
DCMP
Chair: Zijia Cheng, Princeton University
Abstract: T19.00001 : Topological Quantum Chemistry for heavy fermion systems
11:30 AM–11:42 AM
Presenter:
Mikel Iraola Iñurrieta
(University of the Basque Country UPV/EHU and DIPC)
Authors:
Mikel Iraola Iñurrieta
(University of the Basque Country UPV/EHU and DIPC)
Roser Valenti
(Goethe University Frankfurt)
Maia Garcia Vergniory
(Donostia International Physics Center and Max Planck Institute for Chemical Physics of Solids)
Juan Luis Mañes
(Department of Physics, University of the Basque Country)
and classify the topological properties of all band structures in all space groups. It has become one of the main
systematic approaches for the theoretical prediction and practical diagnosis of topological phases in materials.
However, it is unclear to which extent it remains applicable to the analysis of strongly-interacting electronic
systems. In this work, we address one of the many facettes of this problem by presenting a TQC-based general
formalism for the topological classification of correlated heavy fermion systems. In particular we focus on
Kondo and mixed valence insulators. This new framework fully accounts for the role played by crystal and time
reversal symmetries in the protection of topological band structures and is applicable to any space group, both
with and without spin-orbit coupling corrections. We apply our approach to the Kondo candidate Ce2I2Si2 and
the mixed-valence compound SmB6 . This analysis has lead us to a precise description of the real-space origin
of their topological valence bands, as well as to a refined classification in the case of SmB6 .
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