论文标题
灯笼在高压下的新相变
New Phase Transition of Lanthanum at High Pressure
论文作者
论文摘要
Lanthanum（La）是稀有元素的第一个成员，由于其独特的超导性能，最近引起了强烈的兴趣。尽管金属LA中的相过渡和超导性有很多理论和实验性工作，但我们在金属LA中获得了一个新的以身体为中心的四方（$ bct $）阶段，其中空间群$ i4/mmm $ i4/mmm $ 190 $ $ 190 $ gpa交换了以前的工作中，从面部中心（$ fcc $）阶段进行了阶段，从而扩展了阶段，从而扩展了阶段。 $ bct $相位显示出一种异常的包装方式，在高压下变成了非关闭包装。讨论了新阶段的更详细的属性。
Lanthanum (La), the first member of the rare-earth elements, recently aroused strong interest due to its unique superhydride with superconducting properties. Although there is much theoretical and experimental work about phase transitions and superconductivity in metallic La, we got a new body-centred tetragonal ($bct$) phase in metallic La with space group $I4/mmm$ at $190$ GPa exchanging from face-centered cubic ($fcc$) phase in previous work, which expanded the phase transition sequence. The $bct$ phase shows an abnormal packing way that turned to non-closed packing at high pressure. And more detailed properties of the new phase are discussed.
