Fermi-level Dirac crossings in 4d and 5d cubic metal oxides: NaPd3O4 and NaPt3O4

Fermi-level Dirac crossings in 4d and 5d cubic metal oxides: NaPd3O4 and NaPt3O4
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DOI:
10.1103/physrevb.99.195148
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发表时间:
2019-05
期刊:
影响因子:
3.7
通讯作者:
S. Teicher;Leo K. Lamontagne;L. Schoop;R. Seshadri
S. Teicher;Leo K. Lamontagne;L. Schoop;R. Seshadri
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
S. Teicher;Leo K. Lamontagne;L. Schoop;R. Seshadri

文献摘要

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立方氧化物金属(或Pt)在非对称空间群中结晶。第一性原理计算在这里被用来理解在电子结构的发展中的正方形平面和相互作用的作用。这些化合物在费米能级附近有许多狄拉克交叉点,在没有自旋轨道耦合的情况下,似乎形成了一个立方节点态。自旋-轨道耦合将这种节点态分裂成具有Dirac-like特征的更小区域,这种分裂在化合物中更为明显。
The cubic oxide metals(or Pt) crystallize in the nonsymmorphicspace group. First-principles calculations are employed here to understand the role of thesquare planes andinteractions in the development of the electronic structure. The compounds host numerous Dirac crossings near the Fermi level which, in the absence of spin-orbit coupling, appear to form a cubic nodal state. Spin-orbit coupling fragments this nodal state into smaller regions with Dirac-like character, with the fragmenting being more pronounced in thecompound.