Polar surface engineering in ultrathin MgO(111)∕Ag(111) : Possibility of a metal-insulator transition and magnetism

• Arita, Ryotaro

• Tanida, Yoshiaki

• Entani, Shiro

• Kiguchi, Manabu

• Saiki, Koichiro

• Aoki, Hideo

Abstract

A recent report [Kiguchi et al., Phys. Rev. B 68, 115402 (2003)] that the (111) surface of 5 MgO layers grown epitaxially on Ag(111) becomes metallic raises a question of what will happen when we have fewer MgO layers. Here we have revealed, first experimentally with electron energy-loss spectroscopy, that MgO(111) remains metallic even when one-layer thick. We have confirmed this theoretically with the density functional theory, where metallization turns out to depend on the nature of the substrate. We finally predict, with a spin-density functional calculation, that a magnetic polar surface can be possible.

Journal

• Physical Review B

  Physical Review B 69 (23), 235423-, 2004-06-30

  American Physical Society

Details

• CRID: 1050282813969545600
• NII Article ID: 120000967490
• ISSN: 10953795
• ISSN: 01631829
• HANDLE: 2115/29773
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles