Electric field control of the semiconductor-metal transition in two dimensional CuInP2S6/germanene van der Waals heterostructure
Electric field control of the semiconductor-metal transition in two dimensional CuInP2S6/germanene van der Waals heterostructure
复制标题
二维 CuInP2S6/锗烯范德华异质结构中半导体-金属转变的电场控制
DOI:
10.1063/1.5100240
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发表时间:
2019-06
影响因子:
4
通讯作者:
Jingshan Qi
中科院分区:
文献类型:
--
作者:
Ziye Zhu;Xiaofang Chen;Wenbin Li;Jingshan Qi
We propose a van der Waals heterostructure CuInP2S6/germanene by combining two dimensional ferroelectric semiconductor CuInP2S6 with germanene. By density functional theory calculations, we find that the metal-semiconductor transition can be realized in the CuInP2S6/germanene heterostructure by controlling the ferroelectric polarization direction. CuInP2S6 induces the sublattice imbalance of germanene by interface interaction and thus makes it become a normal semiconductor. Then, two opposite ferroelectric polarization states in CuInP2S6/germanene lead to a different band alignment and finally determine its metallic or semiconductor properties. Large transition barriers from ferroelectric to antiferroelectric phases ensure its stability at room temperature. This is a pure electric field controlled metal-semiconductor transition, which has great application potential for exploring nonvolatile ferroelectric switches and memory devices.
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影响因子:
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作者:
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通讯作者:
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影响因子:
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DOI:
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Nature Reviews Methods Primers
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