Phase diagram and polarization of stable phases of (Ga1-xInx)2O3
Phase diagram and polarization of stable phases of (Ga1-xInx)2O3
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DOI：
10.7567/apex.9.041102
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发表时间：
2016-04-01
影响因子：
2.3
通讯作者：
Fiorentini, Vincenzo
中科院分区：
文献类型：
--
作者：
Maccioni, Maria Barbara;Fiorentini, Vincenzo
从理论上得到了（Ga1-xInx）(2)O-3的全相图。争夺基态的相有单斜相（低x）、六方相（x类似于0.5）和bixbyite相（大x）。三个不相连的混合区与两个不同的相分离区交织在一起，在x近似于0.5时，具有相分离二元组分的六角形合金和β合金有望共存。我们还探索了相的永久极化，但它们都不是极性的。另一方面，我们发现在最近的实验中稳定的epsilon-Ga2O3具有大极化和压电耦合的热释电特性，可以在界面处产生高密度的电子气体。(C) 2016 .日本应用物理学会
The full phase diagram of (Ga1-xInx)(2)O-3 is obtained theoretically. The phases competing for the ground state are monoclinic beta (low x), hexagonal (x similar to 0.5), and bixbyite (large x). Three disconnected mixing regions interlace with two distinct phase-separation regions, and at x similar to 0.5, the coexistence of hexagonal and beta alloys with phase-separated binary components is expected. We also explore the permanent polarization of the phases, but none of them are polar. On the other hand, we find that epsilon-Ga2O3, which was stabilized in recent experiments, is pyroelectric with a large polarization and piezoelectric coupling, and could be used to produce high-density electron gases at interfaces. (C) 2016 The Japan Society of Applied Physics