Freestanding Ferroelectric Bubble Domains

被引：40

作者：

Bakaul, Saidur R. ^{[1
]}

Prokhorenko, Sergei ^{[2
,3
]}

Zhang, Qi ^{[4
]}

Nahas, Yousra ^{[2
,3
]}

Hu, Yushi ^{[5
]}

Petford-Long, Amanda ^{[1
]}

Bellaiche, Laurent ^{[2
,3
]}

Valanoor, Nagarajan ^{[4
]}

机构：

[1] Argonne Natl Lab, Mat Sci Div, Lemont, IL 60439 USA

[2] Univ Arkansas, Phys Dept, Fayetteville, AR 72701 USA

[3] Univ Arkansas, Inst Nanosci & Engn, Fayetteville, AR 72701 USA

[4] Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

[5] Univ Chicago, Dept Comp Sci, 5730 S Ellis Ave, Chicago, IL 60637 USA

来源：

ADVANCED MATERIALS | 2021年 / 33卷 / 45期

基金：

澳大利亚研究理事会;

关键词：

ferroelectric bubbles; freestanding heterostructures; ripples; single-crystal complex oxides; skyrmions; NEGATIVE CAPACITANCE; PEROVSKITES; PATTERNS;

D O I：

10.1002/adma.202105432

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Bubble-like domains, typically a precursor to the electrical skyrmions, arise in ultrathin complex oxide ferroelectric-dielectric-ferroelectric heterostructures epitaxially clamped with flat substrates. Here, it is reported that these specially ordered electric dipoles can also be retained in a freestanding state despite the presence of inhomogeneously distributed structural ripples. By probing local piezo and capacitive responses and using atomistic simulations, this study analyzes these ripples, sheds light on how the bubbles are stabilized in the modified electromechanical energy landscape, and discusses the difference in morphology between bubbles in freestanding and as-grown states. These results are anticipated to be the starting point of a new paradigm for the exploration of electric skyrmions with arbitrary boundaries and physically flexible topological orders in ferroelectric curvilinear space.

引用

页数：10

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