Electronic Manifestation of Cation-Vacancy-Induced Magnetic Moments in a Transparent Oxide Semiconductor: Anatase Nb:TiO2

Authors

  • Shixiong Zhang,

    Corresponding author
    1. Center for Nanophysics and Advanced Materials University of Maryland College Park, MD 20742-4111 (USA)
    • Center for Nanophysics and Advanced Materials University of Maryland College Park, MD 20742-4111 (USA).
    Search for more papers by this author
  • Satishchandra B. Ogale,

    Corresponding author
    1. Physical and Materials Chemistry Division National Chemical Laboratory Dr. Homi Bhabha Road, Pune 411008 (India)
    • Physical and Materials Chemistry Division National Chemical Laboratory Dr. Homi Bhabha Road, Pune 411008 (India).
    Search for more papers by this author
  • Weiqiang Yu,

    1. Center for Nanophysics and Advanced Materials University of Maryland College Park, MD 20742-4111 (USA)
    2. Present address: Department of Physics, Renmin University of China Beijing 100872, (P.R. China)
    Search for more papers by this author
  • Xingyu Gao,

    1. Department of Physics National University of Singapore 2 Science Drive 3, Singapore 117542 (Singapore)
    Search for more papers by this author
  • Tao Liu,

    1. Department of Physics National University of Singapore 2 Science Drive 3, Singapore 117542 (Singapore)
    Search for more papers by this author
  • Saurabh Ghosh,

    1. Department of Materials Science Indian Association for the Cultivation of Science Jadavpur, Kolkata 700032 (India)
    Search for more papers by this author
  • Gour P. Das,

    1. Department of Materials Science Indian Association for the Cultivation of Science Jadavpur, Kolkata 700032 (India)
    Search for more papers by this author
  • Andrew T. S. Wee,

    1. Department of Physics National University of Singapore 2 Science Drive 3, Singapore 117542 (Singapore)
    Search for more papers by this author
  • Richard L. Greene,

    1. Center for Nanophysics and Advanced Materials University of Maryland College Park, MD 20742-4111 (USA)
    Search for more papers by this author
  • Thirumalai Venkatesan

    Corresponding author
    1. Center for Nanophysics and Advanced Materials University of Maryland College Park, MD 20742-4111 (USA)
    2. Department of Physics and Department of Electrical and Computer Engineering National University of Singapore 2 Science Drive 3, Singapore 117542 (Singapore)
    • Department of Physics and Department of Electrical and Computer Engineering National University of Singapore 2 Science Drive 3, Singapore 117542 (Singapore).
    Search for more papers by this author

Abstract

original image

Nb-doped anatase TiO2 thin films grown by pulsed-laser deposition show Kondo scattering in elctronic-transport measurements, providing evidence for the formation of magnetic moments. The origin of magnetism is attributed to cation (Ti) vacancies, confirmed by X-ray absorption spectroscopy and first-principle calculations. The Ti vacancies are controlled by oxygen partial pressure during growth.

Ancillary