Deterministic Switching of Ferroelectric Bubble Nanodomains

Zhang, Qi; Prokhorenko, Sergei; Nahas, Yousra; Xie, Lin; Bellaïche, L.; Gruverman, Alexei; Valanoor, Nagarajan

doi:10.1002/adfm.201808573

Cited by 34 publications

(21 citation statements)

References 53 publications

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“…Recently, the deterministic and reversible transformation of bubble domains into cylindrical domains using a scanning probe microscopy (SPM) approach was demonstrated by the same group. [ 259 ] The bubble domain state can be created by an electrical pulse with a specific combination of amplitude and duration, meanwhile it can be erased by a mechanical force via the AFM tip. This pathway for switching between various topological defects holds promise for emergent devices.…”

Section: Topological Structures In Ferroelectric/ferroelastic Thin Fimentioning

confidence: 99%

Recent Progress on Topological Structures in Ferroic Thin Films and Heterostructures

et al. 2020

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Topological spin/polarization structures in ferroic materials continue to draw great attention as a result of their fascinating physical behaviors and promising applications in the field of high‐density nonvolatile memories as well as future energy‐efficient nanoelectronic and spintronic devices. Such developments have been made, in part, based on recent advances in theoretical calculations, the synthesis of high‐quality thin films, and the characterization of their emergent phenomena and exotic phases. Herein, progress over the last decade in the study of topological structures in ferroic thin films and heterostructures is explored, including the observation of topological structures and control of their structures and emergent physical phenomena through epitaxial strain, layer thickness, electric, magnetic fields, etc. First, the evolution of topological spin structures (e.g., magnetic skyrmions) and associated functionalities (e.g., topological Hall effect) in magnetic thin films and heterostructures is discussed. Then, the exotic polar topologies (e.g., domain walls, closure domains, polar vortices, bubble domains, and polar skyrmions) and their emergent physical properties in ferroelectric oxide films and heterostructures are explored. Finally, a brief overview and prospectus of how the field may evolve in the coming years is provided.

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Section: Topological Structures In Ferroelectric/ferroelastic Thin Fimentioning

confidence: 99%

Recent Progress on Topological Structures in Ferroic Thin Films and Heterostructures

et al. 2020

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“…This is particularly relevant in the case of ferroic materials, where complex domain wall arrangements primarily drive emergent phenomena 4 . Understanding the intricate formation processes at play in the formation of modulated phases is thus pivotal for the development of future technologies, e.g., domain wall nanoelectronics [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]21,22 , a field of research that has recently seen fiery surge of interest. So far, modulated phases of ferroelectric domains such as the dipolar maze or labyrinthine phase 23 , and the nano-bubble or skyrmionic phase 21,22,24 have been somewhat regarded as conceptually disparate [24][25][26][27][28][29][30] .…”

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confidence: 99%

Topology and control of self-assembled domain patterns in low-dimensional ferroelectrics

et al. 2020

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Whilst often discussed as non-trivial phases of low-dimensional ferroelectrics, modulated polar phases such as the dipolar maze and the nano-bubble state have been appraised as essentially distinct. Here we emphasize their topological nature and show that these self-patterned polar states, but also additional mesophases such as the disconnected labyrinthine phase and the mixed bimeron-skyrmion phase, can be fathomed in their plurality through the unifying canvas of phase separation kinetics. Under compressive strain, varying the control parameter, i.e., the external electric field, conditions the nonequilibrium self-assembly of domains, and bridges nucleation and spinodal decomposition via the sequential onset of topological transitions. The evolutive topology of these polar textures is driven by the (re)combination of the elementary topological defects, merons and antimerons, into a plethora of composite topological defects such as the fourfold junctions, the bimeron and the target skyrmion. Moreover, we demonstrate that these manipulable defects are stable at room temperature and feature enhanced functionalities, appealing for devising future topological-based nanoelectronics.

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“…Figure a,b shows the dual amplitude resonance tracking (DART) mode piezoresponse force microscopy (PFM) images of bubble domains. [ 23 ] In bubble domains, the direction of the intrinsic displacement of positive and negative ions in the PZT layers bend away from the <001> crystal axis. Due to the inhomogeneously oriented local polarization directions and their small responses to electric field, the bubbles (examples marked by boxes shown in Figure 1) exhibit low‐average piezoresponse amplitude ( d ) and a moderate relative phase shift compared to the large unipolar domains.…”

Section: Resultsmentioning

confidence: 99%

Freestanding Ferroelectric Bubble Domains

et al. 2021

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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.

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Deterministic Switching of Ferroelectric Bubble Nanodomains

Cited by 34 publications

References 53 publications

Recent Progress on Topological Structures in Ferroic Thin Films and Heterostructures

Recent Progress on Topological Structures in Ferroic Thin Films and Heterostructures

Topology and control of self-assembled domain patterns in low-dimensional ferroelectrics

Freestanding Ferroelectric Bubble Domains

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