標題: Purely in-plane ferroelectricity in monolayer SnS at room temperature
作者: Higashitarumizu, Naoki
Kawamoto, Hayami
Lee, Chien-Ju
Lin, Bo-Han
Chu, Fu-Hsien
Yonemori, Itsuki
Nishimura, Tomonori
Wakabayashi, Katsunori
Chang, Wen-Hao
Nagashio, Kosuke
交大名義發表
電子物理學系
National Chiao Tung University
Department of Electrophysics
公開日期: 15-五月-2020
摘要: 2D van der Waals ferroelectrics have emerged as an attractive building block with immense potential to provide multifunctionality in nanoelectronics. Although several accomplishments have been reported in ferroelectric switching for out-of-plane ferroelectrics down to the monolayer, a purely in-plane ferroelectric has not been experimentally validated at the monolayer thickness. Herein, an in-plane ferroelectricity is demonstrated for micrometer-size monolayer SnS at room temperature. SnS has been commonly regarded to exhibit the odd-even effect, where the centrosymmetry breaks only in the odd-number layers to exhibit ferroelectricity. Remarkably, however, a robust room temperature ferroelectricity exists in SnS below a critical thickness of 15 layers with both an odd and even number of layers, suggesting the possibility of controlling the stacking sequence of multilayer SnS beyond the limit of ferroelectricity in the monolayer. This work will pave the way for nanoscale ferroelectric applications based on SnS as a platform for in-plane ferroelectrics. Out-of-plane ferroelectricity is usually unstable in the two dimensional limit due to the presence of the depolarization field. Here, the authors successfully circumvent this issue by growing mu m-sized SnS monolayers that exhibit in-plane ferroelectricity that is stable at room temperature.
URI: http://dx.doi.org/10.1038/s41467-020-16291-9
http://hdl.handle.net/11536/154602
ISSN: 2041-1723
DOI: 10.1038/s41467-020-16291-9
期刊: NATURE COMMUNICATIONS
Volume: 11
Issue: 1
起始頁: 0
結束頁: 0
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