Rediscovering the MP15 Family (M = Li, Na, and K) as an Anisotropic Layered Semiconducting Material,The Journal of Physical Chemistry Letters

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Rediscovering the MP15 Family (M = Li, Na, and K) as an Anisotropic Layered Semiconducting Material
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2018-01-31 00:00:00 , DOI: 10.1021/acs.jpclett.7b02817
Yanhan Yang _{1,

2} , Nan Tian _{1,

3} , Yongzhe Zhang _{1,

2} , Danmin Liu _{1,

3} , Dong Zhang ₄ , Kai Chang ₄ , Hui Yan _{1,

2}

Affiliation

The binary alkaline metal phosphides family MP₁₅ (M = Li, Na, K) exhibiting a layered structure nature and in-plane anisotropy is discussed through first principles. Their thickness-dependent bandstructures are reported for the first time. Furthermore, the transport studies demonstrate that single-layer MP₁₅ exhibits a large anisotropic ratio for carrier mobility (both electron and hole) (∼10¹–10² magnitude) between two special crystal directions, which is the record high value among the reported two-dimensional anisotropic materials. Additionally, the chemical stability under ambient conditions and the binding energy which relates to experimental exfoliation are also investigated. The high anisotropy of the layered semiconducting MP₁₅ family could open up considerable promise for anisotropic optics, electronics, optoelectronics devices, and energy storage applications.

中文翻译：

重新发现MP ₁₅族（M = Li，Na和K）作为各向异性层状半导体材料

通过第一原理讨论了表现出层状结构性质和面内各向异性的二元碱金属磷化物家族MP ₁₅（M = Li，Na，K）。首次报道了它们的厚度依赖性能带结构。此外，传输研究表明，单层MP ₁₅在两个特殊晶体方向之间的载流子迁移率（电子和空穴）（〜10 ¹ –10 ²量级）表现出较大的各向异性，这是已报道的最高值二维各向异性材料。另外，还研究了在环境条件下的化学稳定性以及与实验性剥离相关的结合能。层状半导体MP的高各向异性₁₅系列可以为各向异性光学，电子，光电子器件和能量存储应用打开广阔的前景。

更新日期：2018-01-31

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