Structural stability and Raman scattering of ZnSe nanoribbons under high pressure

被引：0

作者：

Yao, L.D. ^{[1
]}

Wang, F.F. ^{[2
]}

Shen, X. ^{[1
]}

You, S.J. ^{[1
]}

Yang, L.X. ^{[1
]}

Jiang, S. ^{[3
]}

Li, Y.C. ^{[3
]}

Zhu, K. ^{[1
]}

Liu, Y.L. ^{[1
]}

Pan, A.L. ^{[2
]}

Zou, B.S. ^{[2
]}

Liu, J. ^{[3
]}

Jin, C.Q. ^{[1
]}

Yu, R.C. ^{[1
]}

机构：

[1] Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy Sciences P.O. Box 603, Beijing, 100190, China

[2] Micro-Nano Technologies Research Center, State key LAB of CBSC, Hunan University, Changsha, 410082, China

[3] Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100039, China

来源：

Journal of Alloys and Compounds | 2009年 / 480卷 / 02期

关键词：

The high-pressure in situ angular dispersive x-ray diffraction (ADXD) study on the zinc blende (ZB) type ZnSe nanoribbons were implemented using image-plate technique and diamond-anvil cell up to about 32 GPa. The pressure-induced structural transition from the ZB to a rocksalt (RS) type phase occurs at about 12.6 GPa; and the relative volume reduction at the transition point is close to 13%. Moreover; the variation in the relative volume with pressure seems discontinuous at about 5.5 GPa; which indicates an unidentified transition. The bulk modulus B0 for the ZB and RS phases were determined through fitting the relative volume-pressure experimental data by Birch-Murnaghan equation of states. High-pressure Raman scattering experiments revealed that the transverse optical (TO) phonon mode splits into two peaks at about 5.5 GPa; which is compatible with the result of ADXD. The disappearance of the longitudinal optical peak above 13 GPa is due to the semiconductor-metal transition. Surprisingly; all Raman scattering peaks begin to become broad from the lower pressure (5-6 GPa) relative to the bulk ZnSe (normally ∼11 GPa); and the corresponding TO phonons become invisible beyond 14.7 GPa. Using the values of the bulk modulus from ADXD experiments; the corresponding mode Grüneisen parameters can be obtained for the ZB phase. © 2009 Elsevier B.V. All rights reserved;

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摘要：

Journal article (JA)

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页码：798 / 801