Year: 2024
Type: article
Abstract: The mixed-valence compound SmB 6 with partially filled samarium 4 f flat bands hybridizing with 5 d conduction bands is a paramount example of a correlated topological heavy-fermion system. In this study, we revisit the topology of SmB 6 within the formalism of topological quantum chemistry and symmetry-based indicators. Based on this approach, we reach a detailed classification of the material's topology, and we reformulate the origin of topology in terms of band representations. We corroborate these aspects by constructing a minimal TB model that is consistent with all the symmetries of the system and is able to reproduce the topology of the material. We finally unveil the previously overlooked formation of multiple topological gaps, and we discuss its implications for experiments. Published by the American Physical Society 2024
Source: Physical Review Research
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
Awards: G1175115578, G1204740081, G120905174, G1272927172, G1338257350, G1578893264, G1622782223, G1719462714, G1750626284, G210041235, G2262748287, G2469010403, G2601397997, G2756433129, G300979063, G3428307696, G34346518, G3480869486, G348919436, G3517273190, G357246561, G3681454997, G3764568615, G4033406476, G4042783231, G410571670, G425668148, G4442677895, G451917667, G4526231891, G5080475149, G5195188938, G531036588, G5539308778, G5903000213, G5943232429, G5967599077, G6691622363, Kavli Institute for Theoretical Physics, G7084143925, G7434936867, G8095803428, Kavli Institute for Theoretical Physics, G929308097
OpenAlex ID: W4402026956