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Transition phase and thermodynamic properties of GaN via first-principles calculations

机译:通过第一性原理计算的GaN的过渡相和热力学性质

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The transition phase of GaN from zincblende (ZB) structure to rocksalt structure (RS) is investigated by ab initio plane-wave pseudopotential density functional theory method, and the thermodynamic properties of the ZB and RS structures are obtained through the quasi-harmonic Debye model. We find that the transition phase from the ZB structure to the RS structure occurs at the pressure of 42.2 GPa, which is in good agreement with other calculated values. Moreover, the dependences of the relative volume V/V-0 on the pressure P, the Debye temperature Theta and heat capacity C-V on the pressure P, as well as the heat capacity C-V on the temperature T are also successfully obtained. (C) 2005 Elsevier Ltd. All rights reserved.
机译:用从头算平面波pot势密度泛函理论方法研究了GaN从闪锌矿(ZB)结构到岩石盐结构(RS)的过渡相,并通过准谐波德拜模型获得了ZB和RS结构的热力学性质。 。我们发现从ZB结构到RS结构的过渡阶段发生在42.2 GPa的压力下,这与其他计算值非常吻合。此外,还成功地获得了相对体积V / V-0与压力P,德拜温度Theta和热容C-V与压力P的关系以及热容C-V与温度T的关系。 (C)2005 Elsevier Ltd.保留所有权利。

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