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首页> 外文期刊>Physica, B. Condensed Matter >First principles electronic and thermal properties of some AlRE intermetallics
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First principles electronic and thermal properties of some AlRE intermetallics

机译:一些AlRE金属间化合物的第一性原理电子和热学性质

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A study on structural and electronic properties of non-magnetic cubic B-2-type AlRE (RE = Sc, Y, La, Ce, Pr and Lu) intermetallics has been done theoretically. The self-consistent tight binding linear muffin tin orbital method is used to describe the electronic properties of these intermetallics at ambient and at high pressure. These compounds show metallic behavior under ambient conditions. The variation of density of states under compression indicates some possibility of structural phase transformation in AlLa, AlCe and AlPr. Thermal properties like Debye temperature and Gruneisen constant are calculated at T = 0 K and at ambient pressure within the Debye-Gruneisen model and compared with the others' theoretical results. Our results are in good agreement. We have also performed a pressure-induced variation of Debye temperature and have found a decrease in Debye temperature around 40 kbar in AIRE (RE = La Ce Pr) intermetallics.
机译:从理论上对非磁性立方B-2型AlRE(RE = Sc,Y,La,Ce,Pr和Lu)金属间化合物的结构和电子性能进行了研究。自洽紧密结合线性松饼锡轨道方法用于描述这些金属间化合物在环境和高压下的电子性能。这些化合物在环境条件下表现出金属行为。压缩状态密度的变化表明AlLa,AlCe和AlPr中存在某些结构相变的可能性。在Debye-Gruneisen模型中,在T = 0 K和环境压力下,计算了诸如德拜温度和Gruneisen常数之类的热性能,并与其他理论结果进行了比较。我们的结果非常吻合。我们还进行了压力引起的德拜温度变化,并发现金属间化合物AIRE(RE = La Ce Pr)中的德拜温度下降了40 kbar。

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