Andrés Mujica and R J Needs 1996 J. Phys.: Condens. Matter 8 L237 doi:10.1088/0953-8984/8/15/001
The Cmcm structure as a stable phase of binary compounds: application to GaAs-II
Andrés Mujica
and R J Needs
LETTER TO THE EDITOR
We have studied the orthorhombic high-pressure phase II of GaAs. We find that the structure previously suggested for this phase is unstable and leads to the same Cmcm structure which was recently found in high-pressure studies of ZnTe and CdTe. We have investigated the mechanism for the distortion leading to Cmcm. Our calculations show that Cmcm GaAs becomes thermodynamically stable at 120 kbar in agreement with experimental data for GaAs-II. The available experimental structural parameters are consistent with this Cmcm structure, which may be common among II - VI and III - V compounds.
- PACS
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62.50.-p High-pressure effects in solids and liquids
- Subjects
- Dates
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Issue 15 (8 April 1996)
Received 22 January 1996
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The Cmcm structure as a stable phase of binary compounds: application to GaAs-II
Andrés Mujica and R J Needs 1996 J. Phys.: Condens. Matter 8 L237
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