Journal of Materials Science

, Volume 54, Issue 9, pp 7035–7047 | Cite as

Planar penta-transition metal phosphide and arsenide as narrow-gap semiconductors with ultrahigh carrier mobility

  • Jun-Hui Yuan
  • Biao Zhang
  • Ya-Qian Song
  • Jia-Fu Wang
  • Kan-Hao XueEmail author
  • Xiang-Shui Miao
Electronic materials


Searching for single-atom thin materials in the planar structure, like graphene and borophene, is one of the most attractive themes in two-dimensional materials. Using density functional theory calculations, we have proposed a series of single-layer planar penta-transition metal phosphides and arsenides, i.e., TM2X4 (TM = Ni, Pd and Pt; X = P, As). According to the calculated phonon dispersion relation and elastic constants, as well as ab initio molecular dynamics simulation results, monolayers of planar penta-TM2X4 are dynamically, mechanically and thermally stable. In addition, screened HSE06 hybrid functional calculations including spin–orbit coupling show that these monolayers are direct band gap semiconductors, with band gaps ranging from 0.14 to 0.77 eV. Ultrahigh carrier mobilities up to 104–105 cm2 V−1 s−1 both for electrons and holes have been confirmed, among the highest in 2D semiconductors. Our results indicate that planar penta-TM2X4 monolayers are interesting narrow-gap semiconductors with ultrahigh carrier mobility as well as excellent optical properties, and may find potential applications in nanoelectronics and photoelectronics.



This work was supported by the National Key Research and Development Program of China (Materials Genome Initiative, 2017YFB0701700), the National Natural Science Foundation of China under Grant No. 11704134, the Fundamental Research Funds for the Central Universities of China under Grant No. HUST:2016YXMS212 and the Hubei “Chu-Tian Young Scholar” program. K.-H. Xue received support from China Scholarship Council (No. 201806165012).

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Wuhan National Research Center for Optoelectronics, School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhanChina
  2. 2.School of ScienceWuhan University of TechnologyWuhanChina
  3. 3.IMEP-LAHCGrenoble INP – MinatecGrenoble Cedex 1France

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