Electric Field Effect in LaTiO3/SrTiO3 Heterostructure.

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  • Yoshida Chikako
    Fujitsu Laboratories Ltd., 10–1 Morinosato–Wakamiya, Atsugi 243–01, Japan
  • Tamura Hirotaka
    Fujitsu Laboratories Ltd., 10–1 Morinosato–Wakamiya, Atsugi 243–01, Japan
  • Yoshida Akira
    Fujitsu Ltd., 10–1 Morinosato–Wakamiya, Atsugi 243–01, Japan
  • Kataoka Yuji
    Fujitsu Laboratories Ltd., 10–1 Morinosato–Wakamiya, Atsugi 243–01, Japan
  • Fujimaki Norio
    Fujitsu Ltd., 10–1 Morinosato–Wakamiya, Atsugi 243–01, Japan
  • Yokoyama Naoki
    Fujitsu Ltd., 10–1 Morinosato–Wakamiya, Atsugi 243–01, Japan

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  • Electric Field Effect in LaTiO3 SrTiO3
  • Electric Field Effect in LaTiO<sub>3</sub>/SrTiO<sub>3</sub> Heterostructure

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We developed a technique to form conductive LaTiO3/SrTiO3 interdiffusion layers with a sheet carrier density in the 1013 cm-2 to 1015 cm-2 range. An LaTiO3/SrTiO3 heterostructure, which showed a field effect, was used as the conductive channel of a superconducting weak link. We also demonstrated that the heterostructure's field effect can be used to control its own electronic conduction characteristics, such as the mobility depth profile.

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