Antiferroelectric Topological Insulators in Orthorhombic AMgBi Compounds (A=Li, Na, K).
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Authors
Monserrat, Bartomeu
Bennett, Joseph W
Rabe, Karin M
Vanderbilt, David
Abstract
We introduce antiferroelectric topological insulators as a new class of functional materials in which an electric field can be used to control topological order and induce topological phase transitions. Using first principles methods, we predict that several alkali-MgBi orthorhombic members of an ABC family of compounds are antiferroelectric topological insulators. We also show that epitaxial strain and hydrostatic pressure can be used to tune the topological order and the band gap of these ABC compounds. Antiferroelectric topological insulators could enable precise control of topology using electric fields, enhancing the applicability of topological materials in electronics and spintronics.
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0912 Materials Engineering
Journal Title
Physical Review Letters
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Journal ISSN
0031-9007
1079-7114
1079-7114
Volume Title
119
Publisher
American Physical Society