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Tensile-strain induced phonon splitting in diamond |
| Meifang Pu(蒲梅芳)1, Feng Zhang(张峰)1, Shan Liu(刘珊)1, Tetsuo Irifune(入舩徹男)2, Li Lei(雷力)1 |
1 Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;
2 Geodynamics Research Center, Ehime University, Matsuyama 790-8577, Japan |
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Abstract The first-order Raman spectroscopy of diamond exhibits splitting and redshift after the burst of high-pressure (160-200 GPa) and high-temperature (~2000 K). The observed longitudinal optical (LO) and the transverse optical (TO) splitting of Raman phonon is related to the tensile-strain induced activation of the forbidden or silent Raman modes that arise in the proximity of the Brillouin zone center.
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Received: 21 January 2019
Revised: 22 March 2019
Accepted manuscript online:
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PACS:
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31.15.ae
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(Electronic structure and bonding characteristics)
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61.43.-j
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(Disordered solids)
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62.20.M-
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(Structural failure of materials)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11774247). |
Corresponding Authors:
Li Lei
E-mail: lei@scu.edu.cn
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Cite this article:
Meifang Pu(蒲梅芳), Feng Zhang(张峰), Shan Liu(刘珊), Tetsuo Irifune(入舩徹男), Li Lei(雷力) Tensile-strain induced phonon splitting in diamond 2019 Chin. Phys. B 28 053102
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