Electric controlling of surface metal-insulator transition in the doped BaTiO3 film | Zendy

Wei Xun | Zendy; Xiang Hao | Zendy; Tao Pan | Zendy; Jialin Zhong | Zendy; Chunlan Ma | Zendy; Fang Hou | Zendy; YinZhong Wu | Zendy

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Electric controlling of surface metal-insulator transition in the doped BaTiO₃ film

Author(s) -

Wei Xun,

Xiang Hao,

Tao Pan,

Jialin Zhong,

Chunlan Ma,

Fang Hou,

YinZhong Wu

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4986846

Subject(s) - doping , materials science , electric field , polarization (electrochemistry) , condensed matter physics , band gap , insulator (electricity) , metal–insulator transition , optoelectronics , metal , chemistry , quantum mechanics , metallurgy , physics

Based on first-principles calculations, the BaTiO3(BTO) film with local La-doping is studied. For a selected concentration and position of doping, the surface metal-insulator transition occurs under the applied electric field, and the domain appears near the surface for both bipolar states. Furthermore, for the insulated surface state, i.e., the downward polarization state in the doped film, the gradient bandgap structure is achieved, which favors the absorption of solar energy. Our investigation can provide an alternative avenue in modification of surface property and surface screening effect in polar materials

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