| Nearly golden-ratio order in Ta metallic glass |
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| 作者姓名： | 蒋元祺 彭平 |
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| 作者单位： | Department of Physics;College of Physics;School of Material Science&Engineering |
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| 基金项目： | Project supported by Qinglan Scholars Program of Nanchang Normal University and Natural Science Foundation(Grant No.20171BAB216001);Scientific Research Project of Education Department of Jiangxi Province,China(Grant Nos.GJJ191114,GJJ161242,and GJJ171110);the National Natural Science Foundation of China(Grant No.51871096)。 |
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| 摘 要： | The formation of mono-atomic tantalum(Ta)metallic glass(MG)through ultrafast liquid cooling is investigated by ab-initio molecular dynamics(MD)simulations.It is found that there exists nearly golden ratio order(NGRO)between the nearest and second nearest atoms in Ta MG,which has been indirectly confirmed by Khmich et al.and Liang et al..The NGRO is another universal structural feature in metallic glass besides the local five-fold symmetry(LFFS).Further analyzing of electronic structure shows that the obvious orientation of covalent bond could be attributed to the NGRO in amorphous Ta at 300 K.
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| 关 键 词： | NEARLY GOLDEN RATIO order(NGRO) METALLIC glass TANTALUM ab-initio molecular dynamics(MD)simulation |
Nearly golden-ratio order in Ta metallic glass |
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| Yuan-Qi Jiang,Ping Peng.Nearly golden-ratio order in Ta metallic glass[J].Chinese Physics B,2020(4):360-367. |
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| Authors: | Yuan-Qi Jiang Ping Peng |
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| Institution: | (Department of Physics,Nanchang Normal University,Nanchang 330032,China;College of Physics,Jilin University,Changchun 130012,China;School of Material Science&Engineering,Hunan University,Changsha 410082,China) |
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| Abstract: | The formation of mono-atomic tantalum (Ta) metallic glass (MG) through ultrafast liquid cooling is investigated by ab-initio molecular dynamics (MD) simulations. It is found that there exists nearly golden ratio order (NGRO) between the nearest and second nearest atoms in Ta MG, which has been indirectly confirmed by Khmich et al. and Liang et al..The NGRO is another universal structural feature in metallic glass besides the local five-fold symmetry (LFFS). Further analyzing of electronic structure shows that the obvious orientation of covalent bond could be attributed to the NGRO in amorphous Ta at 300 K. |
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