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http://hdl.handle.net/10397/87602
Title: | Ab initio simulation studies on the room-temperature ferroelectricity in two-dimensional β-phase GeS | Authors: | Yin, H Liu, C Zheng, G. P. Wang, Y Ren, F |
Issue Date: | 2019 | Source: | Applied physics letters, 13 May 2019, v. 114, no. 19, 192903, p. 192903-1-192903-5 | Abstract: | Stable ferroelectricity with an in-plane spontaneous polarization of 2.00 × 10−10 C/m is found in two-dimensional (2D) β-GeS monolayers from theoretical calculations, which can be effectively tuned by the applied tensile strains. The Curie temperature of the monolayer is evaluated to be 358 K by ab initio molecular dynamics simulations. Remarkably, the 2D ferroelectricity is found to exist in 2D few-layer β-GeS nanosheets which could be synthesized in experiments. The strong spontaneous polarization and giant pyroelectric coefficient accompanied by the appearance of phase transition near room temperature facilitate the development of β-GeS monolayers or nanosheets for applications in ferroelectric, pyroelectric, and piezoelectric devices with superior performance. | Publisher: | American Institute of Physics | Journal: | Applied physics letters | ISSN: | 0003-6951 | EISSN: | 1077-3118 | DOI: | 10.1063/1.5097425 | Rights: | © 2019 Author(s). This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in H. Yin et al., Appl. Phys. Lett. 114, 192903 (2019) and may be found at https://dx.doi.org/10.1063/1.5097425 |
Appears in Collections: | Journal/Magazine Article |
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Yin_Ab_Initio_Simulation.pdf | 1.69 MB | Adobe PDF | View/Open |
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