单层
材料科学
自旋电子学
兴奋剂
带隙
密度泛函理论
磁性
杂质
石墨烯
光电子学
凝聚态物理
纳米技术
铁磁性
计算化学
物理
化学
量子力学
作者
Rituparna Hazarika,Bulumoni Kalita
标识
DOI:10.1016/j.mssp.2023.107514
摘要
The electronic, magnetic and optical properties of graphene-like MgO monolayers doped with B, C and N atoms in both Mg and O sites are investigated in the framework of density functional theory. The impurity atoms induce magnetism in the host material irrespective of the sites of substitution. The HSE based hybrid DFT calculations show that the wide electronic band gap semiconducting pristine MgO monolayer becomes metallic due to B and C doping in the Mg site of MgO monolayer system (BMg and CMg). However, rests of the doped monolayers remain semiconducting with appearance of impurity states that lowers their energy band gaps compared to the pristine value. Accordingly, the optical behaviour of the doped systems get tuned making them optically active for a wide spectral range in electromagnetic spectrum starting from infrared to UV region. Therefore, such site selective modulation of electronic and optical properties achieved through substitutional doping in MgO monolayers may be effective for desirable moulding of these materials for spintronic and optoelectronic applications.
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