Evidence for Anionic Excess Electrons in a Quasi-Two-Dimensional Ca2N Electride by Angle-Resolved Photoemission Spectroscopy

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• 作者：Ji Seop Oh ; Chang-Jong Kang ; Ye Ji Kim ; Soobin Sinn ; Moonsup Han ; Young Jun Chang ; Byeong-Gyu Park ; Sung Wng Kim ; Byung Il Min ; Hyeong-Do Kim ; Tae Won Noh
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：March 2, 2016
• 年：2016
• 卷：138
• 期：8
• 页码：2496-2499
• 全文大小：322K
• ISSN：1520-5126

文摘

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.