Yuefeng Nie1
Nanjing University1
The synthesis of high-quality freestanding oxide membranes provides unprecedented opportunities for the exploration of novel phases and applications of transition meatal oxides<sup>[1</sup><sup>,2]</sup>. In this talk, I will present the synthesis of freestanding perovskite membranes with high crystalline quality and discuss their great potential electronic applications. By integrating freestanding PbTiO<sub>3</sub>/SrTiO<sub>3</sub> bilayers with silicon wafer, we obtained high-density skyrmion-like polar nanodomains. Moreover, an external electric field can reversibly switch these nanodomains into the other type of polar texture, which substantially modifies their resistive behaviours<sup>[3]</sup>. We also explored the ferroelectric size effects in ultrathin SrTiO<sub>3</sub> membranes<sup>[4]</sup> and the integration of conducting charged domain walls of BaTiO<sub>3</sub> membranes on silicon wafers<sup>[5]</sup>. All these new advances demonstrate the great potential of ferroelectric oxide membranes in nonvolatile memory and related electronic applications.<br/><br/>References<br/><sup>[1]</sup> Lu, D. <i>et al</i>. <b><i>Nat. Mater.</i></b> 15, 1255–1260 (2016)<br/><sup>[2]</sup> D.X. Ji <i>et al</i>. <b><i>Nature</i></b> 570 87–90 (2019)<br/><sup>[3]</sup> L. Han <i>et al</i>. <b><i>Nature</i></b> 603, 63–67 (2022)<br/><sup>[4]</sup> H.Y. Sun <i>et al</i>. under review<br/><sup>[5]</sup> H.Y. Sun <i>et al</i>. <b><i>Nat. Commun.</i></b>13,4332 (2022)