Directional Forces by Momentumless Excitation and Order-to-Order Transition in Peierls-Distorted Solids The Case of GeTe
文献类型：期刊论文
| 作者 | Chen, N. K.; Li, X. B.; Bang, J.; Wang, X. P.; Han, D. ; West, D.; Zhang, S. B.; Sun, H. B.
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| 刊名 | Physical Review Letters
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| 出版日期 | 2018 |
| 卷号 | 120期号:18页码:5 |
| 关键词 | total-energy calculations phase-change materials wave basis-set optical-properties efficient pseudopotentials ferroelectrics phonons gap Physics |
| ISSN号 | 0031-9007 |
| DOI | 10.1103/PhysRevLett.120.185701 |
| 英文摘要 | Time-dependent density-functional theory molecular dynamics reveals an unexpected effect of optical excitation in the experimentally observed rhombohedral-to-cubic transition of GeTe. The excitation induces coherent forces along [001], which may be attributed to the unique energy landscape of Peierls-distorted solids. The forces drive the A(lg) optical phonon mode in which Ge and Te move out of phase. Upon damping of the A(1)g mode, phase transition takes place, which involves no atomic diffusion, defect formation, or the nucleation and growth of the cubic phase. |
| 源URL | [http://ir.ciomp.ac.cn/handle/181722/60955]  |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 GB/T 7714 | Chen, N. K.,Li, X. B.,Bang, J.,et al. Directional Forces by Momentumless Excitation and Order-to-Order Transition in Peierls-Distorted Solids The Case of GeTe[J]. Physical Review Letters,2018,120(18):5. |
| APA | Chen, N. K..,Li, X. B..,Bang, J..,Wang, X. P..,Han, D..,...&Sun, H. B..(2018).Directional Forces by Momentumless Excitation and Order-to-Order Transition in Peierls-Distorted Solids The Case of GeTe.Physical Review Letters,120(18),5. |
| MLA | Chen, N. K.,et al."Directional Forces by Momentumless Excitation and Order-to-Order Transition in Peierls-Distorted Solids The Case of GeTe".Physical Review Letters 120.18(2018):5. |
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