Evidence for Anionic Excess Electrons in a Quasi-Two-Dimensional Ca2N Electride by Angle-Resolved Photoemission Spectroscopy,Journal of the American Chemical Society

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Evidence for Anionic Excess Electrons in a Quasi-Two-Dimensional Ca2N Electride by Angle-Resolved Photoemission Spectroscopy
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2016-02-17 , DOI: 10.1021/jacs.5b12668
Ji Seop Oh _{1,

2} , Chang-Jong Kang ₃ , Ye Ji Kim _{4,

5} , Soobin Sinn _{1,

2} , Moonsup Han ₆ , Young Jun Chang ₆ , Byeong-Gyu Park ₇ , Sung Wng Kim ₄ , Byung Il Min ₃ , Hyeong-Do Kim _{1,

2} , Tae Won Noh _{1,

2}

Affiliation

Angle-resolved photoemission spectroscopy (ARPES) study of a layered electride Ca2N was carried out to reveal its quasi-two-dimensional electronic structure. The band dispersions and the Fermi-surface map are consistent with the density functional theory results except for a chemical potential shift that may originate from the high reactivity of surface excess electrons. Thus, the existence of anionic excess electrons in the interlayer region of Ca2N is strongly supported by ARPES.

中文翻译：

通过角分辨光电发射光谱法证明准二维 Ca2N 电极中阴离子过量电子

对层状电子化合物 Ca2N 进行角分辨光电子能谱 (ARPES) 研究以揭示其准二维电子结构。带色散和费米表面图与密度泛函理论结果一致，除了可能源于表面多余电子的高反应性的化学势位移。因此，ARPES 强烈支持 Ca2N 层间区域中阴离子过量电子的存在。

更新日期：2016-02-17

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