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

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

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54 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)2496-2499
Number of pages4
JournalJournal of the American Chemical Society
Volume138
Issue number8
DOIs
StatePublished - 2 Mar 2016

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