贵金属
布里渊区
费米能级
凝聚态物理
态密度
氧气
合金
金属
化学
材料科学
化学物理
物理
冶金
核物理学
电子
有机化学
作者
S. R. Barman,Aparna Chakrabarti
标识
DOI:10.1016/j.ssc.2019.04.006
摘要
The interaction of oxygen with noble metals such as silver has been an important topic of research for many decades. Here, we show occurrence of a peak in the density of states (DOS) at the Fermi level (EF) when oxygen atoms occupy disordered substitutional positions in noble metals such as Ag, Au or Ag-Au alloy. This results in large enhancement of DOS at EF with respect to Ag or Au metal. Its origin is attributed to O 2p related disorder broadened flat band that straddles almost all the high symmetry directions of the Brillouin zone. Our work suggests that if a large concentration of disordered oxygen can be realized in nano-structures of noble metals, it may lead to interesting phenomenon.
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