Structural and Electronic Properties of Barium Silicide on Si(100)

Structural and Electronic Properties of Barium Silicide on Si(100)
复制标题

Si(100)上硅化钡的结构和电子性质

DOI:
10.1143/jjap.41.4965
复制
发表时间:
2002
影响因子:
1.5
通讯作者:
K. Ueda
K. Ueda
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
K. Ojima;M. Yoshimura;K. Ueda

文献摘要

参考文献

被引文献

相似文献

用扫描隧道显微镜/光谱(STM/STS)研究了Si(100)表面上形成的钡硅化物。硅化物表面的结构取决于制备过程;当样品温度为850 K时,在Si(100)上沉积2个单层(ML)的Ba时,在表面上存在3种硅化物相;而当样品温度为室温时,在Si(100)上沉积2个ML的Ba,然后在850 K下退火时,在表面上出现3种硅化物相中的2种。STS结果表明,所有相均表现出半导体性质,禁带宽度为1.3eV,其中一相的局域态密度(LDOS)在费米能级以下2.5eV处,这与亚稳态去激发谱(MDS)和紫外光电子能谱(UPS)的结果一致.
Barium silicides formed on the Si(100) surface have been investigated by scanning tunneling microscopy/spectroscopy (STM/STS). The structure of the silicide surface depends on the preparation procedure; three kinds of silicide phases coexist on the surface when 2 monolayers (MLs) of Ba are deposited on Si(100) at the specimen temperature of 850 K, while two of the three phases appear when 2 MLs of Ba are deposited on Si(100) at room temperature, followed by annealing at 850 K. The STS result indicates that all the phases show semiconducting behavior with a band gap of ∼ 1.3 eV and that one of the three phases has local density of states (LDOS) at 2.5 eV below the Fermi energy, which coincides with the reported results of metastable de-excitation spectroscopy (MDS) and ultraviolet photoelectron spectroscopy (UPS).
S. Hongo:“通过钾吸附从氘端硅 (100) 中获得 D_2 的新解吸状态”表面科学。
DOI: --
发表时间: --
期刊:
影响因子: --
作者:
通讯作者: --