TY  - JOUR
A1  - Rosa, Priscila
A1  - Xu, Yuanfeng
A1  - Rahn, Marein
A1  - Souza, Jean
A1  - Kushwaha, Satya
A1  - Veiga, Larissa
A1  - Bombardi, Alessandro
A1  - Thomas, Sean
A1  - Janoschek, Marc
A1  - Bauer, Eric
A1  - Chan, Mun
A1  - Wang, Zhijun
A1  - Thompson, Joe
A1  - Harrison, Neil
A1  - Pagliuso, Pascoal
A1  - Bernevig, Andrei
A1  - Ronning, Filip
T1  - Colossal magnetoresistance in a nonsymmorphic antiferromagnetic insulator
T2  - npj Quantum Materials
N2  - Here we investigate antiferromagnetic Eu5In2Sb6, a nonsymmorphic Zintl phase. Our electrical transport data show that Eu5In2Sb6 is remarkably insulating and exhibits an exceptionally large negative magnetoresistance, which is consistent with the presence of magnetic polarons. From ab initio calculations, the paramagnetic state of Eu5In2Sb6 is a topologically nontrivial semimetal within the generalized gradient approximation (GGA), whereas an insulating state with trivial topological indices is obtained using a modified Becke−Johnson potential. Notably, GGA + U calculations suggest that the antiferromagnetic phase of Eu5In2Sb6 may host an axion insulating state. Our results provide important feedback for theories of topological classification and highlight the potential of realizing clean magnetic narrow-gap semiconductors in Zintl materials.
Y1  - 2020
UR  - https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/115117
UR  - https://nbn-resolving.org/urn:nbn:de:bvb:384-opus4-1151178
SN  - 2397-4648
VL  - 5
IS  - 1
SP  - 52
PB  - Springer Science and Business Media LLC
ER  -