[1]于红艳,吴宝嘉*.GaAs在高压下的金属相变[J].延边大学学报(自然科学版),2020,46(01):40-42.
　YU Hongyan,WU Baojia*.Metal phase transition of GaAs under high pressure[J].Journal of Yanbian University,2020,46(01):40-42.
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GaAs在高压下的金属相变

《延边大学学报(自然科学版)》[ISSN:1004-4353/CN:22-1191/N] 卷: 第46卷 期数: 2020年01期 页码: 40-42 栏目: 基础科学研究 出版日期: 2020-05-26
Title:
Metal phase transition of GaAs under high pressure
文章编号:
1004-4353(2020)01-0040-03
作者:
于红艳;  吴宝嘉*
( 延边大学 理学院, 吉林 延吉 133002 )
Author(s):
YU Hongyan;  WU Baojia*
( College of Science, Yanbian University, Yanji 133002, China )
关键词:
高压;  GaAs;  结构相变;  金属化
Keywords:
high pressure;  GaAs;  structural phase transition;  metallization
分类号:
O521+.2
文献标志码:
A
摘要:
为探究GaAs的晶体结构随压力的变化,在高压下对GaAs进行了原位电阻率测量,结果显示GaAs在12.0 GPa左右发生zb相到Cmcm相的相变.为探究Cmcm相的状态类别,在高压下对GaAs的变温电阻率进行了测量,结果显示GaAs的Cmcm相为金属相.在6.0 GPa和20.0 GPa下分别对GaAs进行了第一性原理计算,结果显示Cmcm相的能带可穿过费米能级,该结果进一步证实了GaAs能够发生金属相变.
Abstract:
In order to explore the change of GaAs crystal structure with pressures, the in situ electrical resisti-vity of GaAs measurements were carried out at high pressures. The results show that the phase transition of GaAs from zb phase to Cmcm phase occurs at about 12.0 GPa. To explore the status of Cmcm phase category, the variable temperature resistivity of GaAs was measured at high pressure. The results show GaAs Cmcm is metallic phase. The first principle calculation of GaAs was carried out at 6.0 GPa and 20.0 GPa, respectively. The results show that the energy band of Cmcm phase can passe through Fermi energy level, further confirming that GaAs can occur metal phase transition.

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备注/Memo

收稿日期: 2020-01-26
*通信作者: 吴宝嘉(1973—),男,教授,研究方向为高压物理.

更新日期/Last Update: 2020-05-26