Magnetic structures of REPdBi half-Heusler bismuthides (RE = Gd, Tb, Dy, Ho, Er)
| Autor: | Dariusz Kaczorowski, Piotr Wiśniewski, Arsen Gukasov, Orest Pavlosiuk, Martin Meven, X. Fabrèges |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Superconductivity
Materials science Condensed matter physics Magnetic structure Neutron diffraction 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Semimetal Electronic Optical and Magnetic Materials Topological insulator 0103 physical sciences Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Electrical and Electronic Engineering 010306 general physics 0210 nano-technology Ternary operation Electronic band structure |
| Zdroj: | Physica B: Condensed Matter. 536:56-59 |
| ISSN: | 0921-4526 |
| DOI: | 10.1016/j.physb.2017.10.062 |
| Popis: | We present results of neutron diffraction on single crystals of several equiatomic ternary compounds of rare-earth elements with palladium and bismuth, crystallizing with cubic MgAgAs-type structure (half-Heusler phases). Band structure calculations showed that many members of that family possess electronic band inversion, which may lead to occurrence of topological insulator or topological semimetal. But even for the compounds without intrinsic band inversion another way of topologically non-trivial state realization, through a specific antiferromagnetic order, has been theoretically proposed. Our results show that the antiferromagnetic structures of all studied bismuthides are characterized by the propagation vector, allowing for antiferromagnetic topological insulator state. Therefore, the antiferromagnetic representatives of half-Heusler family are excellent candidates for extended investigations of coexistence of superconductivity, magnetic order and non-trivial topology of electronic states. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect