Layered Structures Favor Superconductivity in Compressed Solid SiH$_{4}$

ORAL

Abstract

The electronic and lattice-dynamics properties of compressed solid SiH$_{4}$ have been calculated over the pressure regime up to 300 GPa with density functional theory. We find that the structures having layered network with eight-fold SiH$_{8}$ coordination favor the metallization and superconductivity. The layered $Cmca$ SiH$_{4}$ is predicted to have a superconducting transition temperature of 75 K at 70 GPa thus opening new possibilities for exploring high temperature superconductivity in the hydrogen-rich system.

*Work supported by HK RGC 402205

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Authors

  • Lin Haiqing

    • Department of Physics and Institue of Theoretical Physics, The Chinese University of Hong, Hong Kong, China
    • Department of Physics and Institute of Theoretical Physics, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China
    • Department of Physics and ITP, The Chinese University of Hong Kong, Hong Kong, China
    • Chinese University of Hong Kong
    • Department of Physics, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong

  • Xiao-Jia Chen

    • Carnegie Institute of Washington

  • Jiang-Long Wang

    • Chinese University of Hong Kong

  • Viktor V. Struzhkin

    • Carnegie Institute of Washington

  • Ho-kwang Mao

    • Carnegie Institute of Washington