Structural stability and electrical properties of AlB2-type MnB2 under high pressure

被引：0

作者：

孟祥旭 ^{[1
]}

范靖 ^{[1
]}

包括 ^{[1
]}

李芳菲 ^{[1
]}

黄晓丽 ^{[1
]}

李岩 ^{[1
]}

田夫波 ^{[1
]}

段德芳 ^{[1
]}

靳锡联 ^{[1
]}

朱品文 ^{[1
]}

何志 ^{[1
]}

周强 ^{[1
]}

高春晓 ^{[1
]}

刘冰冰 ^{[1
]}

崔田 ^{[1
]}

机构：

[1] State Key Laboratory of Superhard Materials, College of Physics, Jilin University

来源：

Chinese Physics B | 2014年 / 23卷 / 01期

基金：

中国国家自然科学基金;

关键词：

transition metal compounds; high pressure effects; structural stability; electrical properties;

D O I：

暂无

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The structural stability and electrical properties of AlB2-type MnB2 were studied based on high pressure angledispersive x-ray diffraction, in situ electrical resistivity measured in a diamond anvil cell(DAC) and first-principles calculations under high pressure. The x-ray diffraction results show that the structure of AlB2-type MnB2 remains stable up to 42.6 GPa. From the equation of state of MnB2, we obtained a bulk modulus value of 169.9±3.7 GPa with a fixed pressure derivative of 4, which indicates that AlB2-type MnB2 is a hard and incompressible material. The electrical resistance undergoes a transition at about 19.3 GPa, which can be explained by a transition of manganese 3d electrons from localization to delocalization under high pressure.

引用

页码：311 / 315

页数：5

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