中国物理B ›› 2020, Vol. 29 ›› Issue (12): 123101-.doi: 10.1088/1674-1056/abab7f

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

  

  • 收稿日期:2020-05-28 修回日期:2020-07-06 接受日期:2020-08-01 出版日期:2020-12-01 发布日期:2020-12-02

Pressure-dependent physical properties of cubic Sr BO3 ( B=Cr, Fe) perovskites investigated by density functional theory

Md Zahid Hasan1, Md Rasheduzzaman1, and Khandaker Monower Hossain2,†   

  1. 1 Department of Electrical and Electronic Engineering, International Islamic University Chittagong, Kumira, Chittagong-4318, Bangladesh; 2 Department of Materials Science and Engineering, University of Rajshahi, Rajshahi-6205, Bangladesh
  • Received:2020-05-28 Revised:2020-07-06 Accepted:2020-08-01 Online:2020-12-01 Published:2020-12-02
  • Contact: Corresponding author. E-mail: monower37@gmail.com
  • Supported by:
    Project supported by the Science Fund from the Ministry of National Science and Technology (NST), Bangladesh.

Abstract: We perform the first-principles investigations of the structural, elastic, electronic, and optical properties of SrBO3 (B =Cr, Fe) perovskites under pressure based on density functional theory (DFT). This is the first detailed pressure-dependent study of the physical properties for these compounds. The calculated structural parameters are consistent with the existing experimental results and slightly decrease with the application of pressure. The mechanical properties are discussed in detail and reveal that the SrCrO3 is harder than SrFeO3. Without pressure, these compounds behave like half-metals, confirmed by their band structure and density of states. Although the SrCrO3 retains its half-metallic nature under pressure, SrFeO3 becomes metallic for both up-spin and down-spin configuration. Both charge density and bond overlap population reveal the covalent nature of Cr-O bond and Fe-O bond in the studied compounds. The optical properties of SrBO3, also discussed for the first time, reveal some interesting results.

Key words: density functional theory (DFT), effects of pressure, electronic band structure, optical properties

中图分类号: 

  • 31.15.E-
62.20.-x (Mechanical properties of solids) 71.20.-b (Electron density of states and band structure of crystalline solids) 78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))