| Can HHe+exist at high pressure:Exploration of high pressure induced HF–He compounds |
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| 作者姓名： | Zifan Wang Haixu Cui Jingyu Hou Xiao Dong |
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| 作者单位： | Key Laboratory of Weak-Light Nonlinear Photonics and School of Physics;College of Physics and Materials Science |
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| 基金项目： | NSFC(Grants No.21803033);Yong Elite Scientists Sponsorship Program by Tianjin(Grant No.TJSQNTJ-2018-18);the support by doctor foundation of Tianjin Normal University(52XB1911). |
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| 摘 要： | HHe+is considered as the strongest acid and most powerful proton donor known to human.Whether HHe+exists at planetary high pressure environment is a quite important problem in physics,chemistry and planetary sciences.Here,using the ab initio evolutionary algorithm USPEX package,we searched HF–He system,which was reported as the most possible candidate to contain HHe+.The calculation proved HHe+cannot form at pressure<1000 GPa,due to a conflict between the covalent component in symmetric hydrogen bond and ionic HHe+.Although He atoms have no chemical bonding with other elements,they can supply a chemical pressure,leading to two new phases He2(HF)4 and He(HF).With coplanar(HF)4rings,He2(HF)4have an aromaticity-like electronic behavior while He(HF)has a new type of chiral HF chain.The formation of He2(HF)4and He(HF)prove that the chemical pressure from He,on par with external pressure,have ability to control the structural and electronic configuration and induce some new familiars of compounds include H and He elements which are fundamental planetary materials in giant planets.
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| 关 键 词： | High pressure chemistry Helium compounds First principle calculation |
Can HHe+exist at high pressure:Exploration of high pressure induced HF–He compounds |
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| Zifan Wang,Haixu Cui,Jingyu Hou,Xiao Dong.Can HHe+exist at high pressure:Exploration of high pressure induced HF–He compounds[J].Geoscience Frontiers,2021,12(2). |
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| Institution: | Key Laboratory of Weak-Light Nonlinear Photonics and School of Physics,Nankai University,Tianjin,300071,China;College of Physics and Materials Science,Tianjin Normal University,Tianjin,300387,China |
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