Impact of interstitial oxygen on the electronic and magnetic structure in superconducting Fe1+yTe Ox thin films

Hefei Hu, Ji Hwan Kwon, Mao Zheng, Can Zhang, Laura H. Greene, James N. Eckstein, Jian Min Zuo

Research output: Contribution to journalArticlepeer-review

Abstract

Interstitial oxygen critical to the emergence of superconductivity in Fe1+yTeOx thin films has been detected. Its location and concentration are measured by atomic-resolution electron-energy-loss spectroscopy with x=0.09. The density functional theory calculations show that oxygen incorporation leads to local disorder in the magnetic moments of Fe, hole doping by oxygen forming ionic bonds with Fe, and a large magnetic- and position-dependent increase or reduction in the Te-Fe-Te bond angles. An examination of bonding based on charge density further reveals covalent charge between Fe and Te, and its reduction with O doping.

Original languageEnglish (US)
Article number180504
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number18
DOIs
StatePublished - Nov 19 2014

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Impact of interstitial oxygen on the electronic and magnetic structure in superconducting Fe1+yTe Ox thin films'. Together they form a unique fingerprint.

Cite this