title: Evidence for Anionic Excess Electrons in a Quasi-Two-Dimensional Ca2N Electride by Angle-Resolved Photoemission Spectroscopy.
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.
authors: Center for Correlated Electron Systems, Institute for Basic Science , Seoul 151-742, Korea.|Department of Physics & Astronomy, Seoul National University , Seoul 151-742, Korea.
authors: Ji Seop
authors: JS
authors: Oh
authors: Department of Physics, Pohang University of Science and Technology , Pohang 790-784, Korea.
authors: Chang-Jong
authors: CJ
authors: Kang
authors: Department of Energy Science, Sungkyunkwan University , Suwon 440-746, Korea.|Center for Integrated Nanostructure Physics, Institute for Basic Science , Suwon 440-746, Korea.
authors: Ye Ji
authors: YJ
authors: Kim
authors: Center for Correlated Electron Systems, Institute for Basic Science , Seoul 151-742, Korea.|Department of Physics & Astronomy, Seoul National University , Seoul 151-742, Korea.
authors: Soobin
authors: S
authors: Sinn
authors: Department of Physics, University of Seoul , Seoul 130-743, Korea.
authors: Moonsup
authors: M
authors: Han
authors: Department of Physics, University of Seoul , Seoul 130-743, Korea.
authors: Young Jun
authors: YJ
authors: Chang
authors: Pohang Accelerator Laboratory, Pohang University of Science and Technology , Pohang 790-784, Korea.
authors: Byeong-Gyu
authors: BG
authors: Park
authors: Department of Energy Science, Sungkyunkwan University , Suwon 440-746, Korea.
authors: Sung Wng
authors: SW
authors: Kim
authors: Department of Physics, Pohang University of Science and Technology , Pohang 790-784, Korea.
authors: Byung Il
authors: BI
authors: Min
authors: Center for Correlated Electron Systems, Institute for Basic Science , Seoul 151-742, Korea.|Department of Physics & Astronomy, Seoul National University , Seoul 151-742, Korea.
authors: Hyeong-Do
authors: HD
authors: Kim
authors: Center for Correlated Electron Systems, Institute for Basic Science , Seoul 151-742, Korea.|Department of Physics & Astronomy, Seoul National University , Seoul 151-742, Korea.
authors: Tae Won
authors: TW
authors: Noh