Bulletin of the American Physical Society
APS March Meeting 2017
Volume 62, Number 4
Monday–Friday, March 13–17, 2017; New Orleans, Louisiana
Session S30: 2D Materials Modeling of Synthesis and Defects
11:15 AM–2:15 PM,
Thursday, March 16, 2017
Sponsoring Unit: DMP
Chair: Elton Santos, Queen's University Belfast UK
Abstract: S30.00009 : Structural phase transitions in two-dimensional atomic materials
12:51 PM–1:03 PM
Over a year ago, we introduced the concept of structural phase transitions in monochalcogenide monolayers such as GeS, GeSe, SnS and SnSe; we determined that monochalcogenides with small mean atomic number may be able to undergo phase transitions prior to melting  and that these materials remain semiconducting on a structural transition that changes the coordination number from three to five. Then, we were the first to demonstrate sudden changes in optical properties, and a quenching of the electric dipole in these two-dimensional ferroelectrics at the transition temperature . In this talk, the three conditions that generalize these transitions to other two-dimensional materials will be presented . References: 1. M. Mehboudi et al. Nano Lett. 16, 1704 (2016). 2. M. Mehboudi et al. arXiv:1603.03748. 3. G. G. Naumis, S. Barraza-Lopez, M. Oliva-Leyva, and H. Terrones. Rep. Prog. Phys. (forthcoming).
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