Electronic structures and heterogeneity of Zr-Cu-Ag metallic glasses

Electronic structures and heterogeneity of Zr-Cu-Ag metallic glasses
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Zr-Cu-Ag金属玻璃的电子结构和异质性

DOI:
10.1016/j.jnoncrysol.2018.06.036
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发表时间:
2018
影响因子:
3.5
通讯作者:
and H. Kato
and H. Kato
中科院分区:
材料科学2区
文献类型:
--
作者:
S. Hosokawa;H. Sato;M. Nakatake;and H. Kato

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利用光电子能谱(PES)和逆光电子能谱(IPES)测量了Zr 50 Cu 50、Zr 45 Cu 45 Ag 10和Zr 40 Cu 40 Ag 20金属玻璃的价带和导带电子结构。根据入射光子能量h ν对PES谱的依赖关系,估算了组成元素的部分dos,发现EF附近的dos主要由Zr的4d电子组成,Cu的3d电子局域在价带。还在Zr 3d、Cu 3 p和Ag 3d水平进行了芯水平PES测量。Zr 3dcore光谱表明在所有这些玻璃中的三种化学状态,表明化学不均匀性。在Zr 3d核能级上观察到能量移动,表明Zr-Cu-Ag金属玻璃体系中存在电荷转移。
Photoemission and inverse-photoemission spectroscopy (PES and IPES) measurements were carried out on Zr50Cu50, Zr45Cu45Ag10, and Zr40Cu40Ag20metallic glasses to investigate the valence- and conduction-band electronic structures, respectively. From the incident photon energy,hν, dependence of the PES spectra, partial DOSs ofsanddelectrons for the constituent elements were estimated, and it was found that the DOS nearEFis mainly composed of Zr 4delectrons and the Cu 3delectrons are localized in the valence band. Core-level PES measurements were also performed at the Zr 3d, Cu 3p, and Ag 3dlevels. The Zr 3dcore spectra indicate three chemical states in all of these glasses, suggesting a chemical heterogeneity. Energy shifts are observed in the Zr 3dcore levels, indicating the charge transfer in the Zr-Cu-Ag metallic glass system.
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