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Keywords:

  • metal/oxide interfaces;
  • ohmic contacts;
  • scanning transmission electron microscopy;
  • x-ray and ultraviolet photoemission;
  • first-principles modeling
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Epitaxial Cr atoms on SrTiO3(001) generate an ideal Ohmic contact with excellent adhesion and a very low contact resistance. Scott Chambers, Meng Gu, and co-workers show on page 4001 that this occurs because of Cr indiffusion to interstitial sites, charge transfer to Ti ions, and metalinduced downward band bending.