Controlling Strain Relaxation by Interface Design in Highly Lattice-Mismatched Heterostructure

Zhang, Yang; Si, Wenlong; Jia, Yanli; Yu, Pu; Yu, Rong; Zhu, Jing

doi:10.1021/acs.nanolett.1c01938

Cited by 9 publications

(6 citation statements)

References 36 publications

(41 reference statements)

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“…Apparently, the intrinsic structural modification using the spacing layer is a different but effective means to influence the orbital occupancies. The consistent results of changing the active spin states of cobalt ions were reported to use the intrinsic crystal symmetry or the extrinsic hydrostatic pressure (15,(55)(56)(57).…”

Section: Dsomentioning

confidence: 60%

Atomically engineered cobaltite layers for robust ferromagnetism

Chen

Zhang

et al. 2022

Sci. Adv.

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Emergent phenomena at heterointerfaces are directly associated with the bonding geometry of adjacent layers. Effective control of accessible parameters, such as the bond length and bonding angles, offers an elegant method to tailor competing energies of the electronic and magnetic ground states. In this study, we construct unit-thick syntactic layers of cobaltites within a strongly tilted octahedral matrix via atomically precise synthesis. The octahedral tilt patterns of adjacent layers propagate into cobaltites, leading to a continuation of octahedral tilting while maintaining substantial misfit tensile strain. These effects induce severe rumpling within an atomic plane of neighboring layers, further triggering the electronic reconstruction between the splitting orbitals. First-principles calculations reveal that the cobalt ions transit to a higher spin state level upon octahedral tilting, resulting in robust ferromagnetism in ultrathin cobaltites. This work demonstrates a design methodology for fine-tuning the lattice and spin degrees of freedom in correlated quantum heterostructures by exploiting epitaxial geometric engineering.

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Section: Dsomentioning

confidence: 60%

Atomically engineered cobaltite layers for robust ferromagnetism

Chen

Zhang

et al. 2022

Sci. Adv.

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“…141 Formation of epitaxy between two active components could result in an electronic interaction which enables active site manipulation or generates a distinct electronic state for enhancing the catalytic activity. Change of crystal symmetry, 142 atomic misalignment, 143 and lattice vacancy formation at the interface 144 can generate strain which leads to an alteration of the electronic structure. 145 The heterostructure/Janus catalyst is particularly efficient for the alkaline HER by accelerating the rate determining Volmer step, where one catalyst enhances the water dissociation step and eases the transfer of adsorbed hydrogen intermediates to another part.…”

Section: Nanoheterostructures For H 2 Generationmentioning

confidence: 99%

Critical Role of Interface Design in Acceleration of Overall Water Splitting and Hybrid Electrolysis Process: State of the Art and Perspectives

et al. 2023

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Electrocatalytic water splitting to hydrogen (H2) is an ideal approach to generate renewable energy. One of the major drawbacks is the tightly coupled kinetically sluggish and energy inefficient anodic oxygen evolution reaction (OER) with hydrogen forming a cathodic half-cell reaction which leads to a significant reduction in overall cell efficiency. In this context, before reviewing the literature, we have first briefly analyzed the energetics of overall water splitting, problems, and challenges under different pH conditions which can be useful for the further understanding of the process. Replacement of the anodic OER by a thermodynamically favorable substrate oxidation offers flexibility, value addition, and energy efficiency in the case of hybrid or assisted water electrolysis to afford hydrogen. Recent progress in terms of sacrificial oxidants in hybrid water electrolysis are discussed in this context, where the sacrificial oxidants are so chosen that the oxidation often leads to its value addition. Also here, we have offered insights into interface designing in heterostructures by modulating chemical and electronic environments for the enhancement of the intrinsic catalytic activity and stability. The effect of incorporation of such materials into the overall water splitting reaction, their catalytic active sites, and interactions with intermediates are thoroughly explored. This review can be a good complement for better understanding of the elucidation of the interface role in hybrid water electrolysis for future commercial applications.

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“…For example, misfit dislocations are frequently seen at the substrate-film interface, allowing bulk-like lattice constants to persist in the thin-film limit 49 . Structural or chemical mismatch at interfaces can additionally be accommodated through oxygen off-stoichiometry 62 , in-plane lattice rotation 94 , or interface reconstruction 87 , as shown in Fig. 11.…”

Section: Epitaxy Of Bulk-stable Compoundsmentioning

confidence: 99%

Epitaxy of hexagonal ABO$_3$ quantum materials

Nordlander¹,

Anderson²,

Brooks³

et al. 2022

Preprint

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Hexagonal ABO 3 oxides (A, B = cation) are a rich materials class for realizing novel quantum phenomena. Their hexagonal symmetry, oxygen trigonal bipyramid coordination and quasi-two dimensional layering give rise to properties distinct from those of the cubic ABO 3 perovskites. As bulk materials, most of the focus in this materials class has been on the rare earth manganites, RMnO 3 (R = rare earth); these materials display coupled ferroelectricity and antiferromagnetic order. In this review, we focus on the thin film manifestations of the hexagonal ABO 3 oxides. We cover the stability of the hexagonal oxides and substrates which can be used to template the hexagonal structure. We show how the thin film geometry not only allows for further tuning of the bulk-stable manganites but also the realization of metastable hexagonal oxides such as the RFeO 3 that combine ferroelectricity with weak ferromagnetic order.The thin film geometry is a promising platform to stabilize additional metastable hexagonal oxides to search for predicted high-temperature superconductivity and topological phases in this materials class.

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Controlling Strain Relaxation by Interface Design in Highly Lattice-Mismatched Heterostructure

Cited by 9 publications

References 36 publications

Atomically engineered cobaltite layers for robust ferromagnetism

Atomically engineered cobaltite layers for robust ferromagnetism

Critical Role of Interface Design in Acceleration of Overall Water Splitting and Hybrid Electrolysis Process: State of the Art and Perspectives

Epitaxy of hexagonal ABO$_3$ quantum materials

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