Document Type
Article
Publication Date
8-28-2018
Publication Title
Physical Review Applied
Volume
10
Issue
2
First page number:
1
Last page number:
8
Abstract
Two-dimensional (2D) materials that exhibit ferroelectric, ferromagnetic, or topological order have been a major focal topic of nanomaterials research in recent years. The latest efforts in this field explore 2D quantum materials that host multiferroic or concurrent ferroic and topological order. We present a computational discovery of multiferroic state with coexisting ferroelectric and ferromagnetic order in recently synthesized CH2OCH3-functionalized germanene. We show that an electric-field-induced rotation of the ligand CH2OCH3 molecule can serve as the driving mechanism to switch the electric polarization of the ligand molecule, while unpassivated Ge p(z) orbits generate ferromagnetism. Our study also reveals coexisting ferroelectric and topological order in ligand-functionalized arsenene, which possesses a switchable electric polarization and a Dirac transport channel. These findings offer insights into the fundamental physics underlying these coexisting quantum orders and open avenues for achieving states of matter with multiferroic or ferroic-topological order in 2D-layered materials for innovative memory or logic device implementations.
Disciplines
Physics
File Format
File Size
2.113 Kb
Language
English
Repository Citation
Kou, L.,
Ma, Y.,
Liao, T.,
Du, A.,
Chen, C.
(2018).
Multiferroic and Ferroic Topological Order in Ligand-Functionalized Germanene and Arsenene.
Physical Review Applied, 10(2),
1-8.
http://dx.doi.org/10.1103/PhysRevApplied.10.024043