TY  - JOUR
A1  - Mertz, Thomas
A1  - Wunderlich, Paul
A1  - Bhattacharyya, Shinibali
A1  - Ferrari, Francesco
A1  - Valentí, Roser
T1  - Statistical learning of engineered topological phases in the kagome superlattice of AV3Sb5
T2  - npj computational materials
N2  - Recent experimental findings have reported the presence of unconventional charge orders in the enlarged (2 × 2) unit-cell of kagome metals AV3Sb5 (A = K, Rb, Cs) and hinted towards specific topological signatures. Motivated by these discoveries, we investigate the types of topological phases that can be realized in such kagome superlattices. In this context, we employ a recently introduced statistical method capable of constructing topological models for any generic lattice. By analyzing large data sets generated from symmetry-guided distributions of randomized tight-binding parameters, and labeled with the corresponding topological index, we extract physically meaningful information. We illustrate the possible real-space manifestations of charge and bond modulations and associated flux patterns for different topological classes, and discuss their relation to present theoretical predictions and experimental signatures for the AV3Sb5 family. Simultaneously, we predict higher-order topological phases that may be realized by appropriately manipulating the currently known systems.
KW  - Electronic properties and materials
KW  - Topological insulators
Y1  - 2022
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/69524
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-695244
SN  - 2057-3960
N1  - Open Access funding enabled and organized by Projekt DEAL.
VL  - 8
IS  - art. 66
SP  - 1
EP  - 6
PB  - Nature Publ. Group
CY  - London
ER  -