Phase Transitions of BaSi_2 at High Pressures and High Temperatures, and Electrical Properties of Quenched Metastable Phases

Motoharu IMAI

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Phase Transitions of BaSi_2 at High Pressures and High Temperatures, and Electrical Properties of Quenched Metastable Phases

机译：高压和高温下Basi_2的相变，淬火亚稳态阶段的电性能

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This paper reviews structural phase transitions of BaSi_2 at high pressures and high temperatures, and electrical resistivity measurements of two quenched high-pressure, high-temperature phases and a stable phase at ambient conditions. In situ x-ray diffraction measurements reveal that BaSi_2 has three high pressure, high temperature phases: trigonal, cubic and an additional phase, at pressures up to 7 GPa and temperatures up to 1300 K. All of the high pressure, high temperature phases can be quenched at ambient conditions. The electrical resistivity measurements of trigonal, cubic and orthorhombic BaSi_2, a stable phase at ambient conditions, at 1 atm show that the electrical resistivity strongly depends on their crystal structure: orthorhombic and cubic BaSi_2 are n-type semiconductors, and trigonal BaSi_2 is a hole metal that shows superconductivity with an onset temperature of 6.8 K.

机译：本文评论了大压力和高温下Basi_2的结构相转变，以及两个淬火高压，高温相的电阻率测量和环境条件下的稳定相。原位X射线衍射测量显示，Basi_2具有三个高压，高温阶段：Trigonal，立方和另外的阶段，在高达7GPa的压力下，温度高达1300k。所有的高压，高温阶段都可以在环境条件下淬火。 Trigonal，立方和正交Basi_2的电阻率测量，环境条件下的稳定相位，在1个ATM中表明电阻率强烈取决于它们的晶体结构：正交和立方Basi_2是n型半导体，并且Trigonal Basi_2是孔显示具有6.8k的起始温度的超导性的金属。

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《日本结晶学会志》 |2001年第2期|共5页
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Motoharu IMAI;
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1. Phase Transitions of BaSi_2 at High Pressures and High Temperatures, and Electrical Properties of Quenched Metastable Phases [J] . Motoharu IMAI 日本结晶学会志 . 2001,第2期

机译：高压和高温下Basi_2的相变，淬火亚稳态阶段的电性能
2. Superconductivity in bulk polycrystalline metastable phases of Sb2Te3 and Bi2Te3 quenched after high-pressure-high-temperature treatment [J] . Buga S. G., Kulbachinskii V. A., Kytin V. G., Chemical Physics Letters . 2015,第Null期

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6. Phase transitions mechanical properties and electronic structures of novel boron phases under high-pressure: A first-principles study [O] . Changzeng Fan, Jian Li, Limin Wang -1

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7. Phase Transitions of BaSi2 at High Pressures and High Temperatures, and Electncal Properties of Quenched Metastable Phases. [O] . Motoharu IMAI 2001

机译：Basi2在高压和高温下的相变，淬火亚稳态阶段的推广性能。

Phase Transitions of BaSi_2 at High Pressures and High Temperatures, and Electrical Properties of Quenched Metastable Phases

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