450 citations · 2.2k across the 27 of their papers we have counts for
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Strain-induced atomic-scale building blocks for ferromagnetism in epitaxial LaCoO3
Sangmoon Yoon, Xiang Gao, Jong Mok Ok +7
The origin of strain-induced ferromagnetism, which is robust regardless of the type and degree of strain in LaCoO3 (LCO) thin films, is enigmatic despite intensive research efforts…
Twin-domain formation in epitaxial triangular lattice delafossites
Jong Mok Ok, Sangmoon Yoon, Andrew R. Lupini +4
Twin domains are often found as structural defects in symmetry mismatched epitaxial thin films. The delafossite ABO2, which has a rhombohedral structure, is a good example that oft…
Effective reduction of PdCoO2 thin films via hydrogenation and sign tunable anomalous Hall effect
Gaurab Rimal, Yiting Liu, Caleb Schmidt +14
PdCoO2 , belonging to a family of triangular oxides called delafossite, is one of the most conducting oxides. Its in-plane conductivity is comparable to those of the best metals, a…
Unusual Electrical Conductivity Driven by Localized Stoichiometry Modification at Vertical Epitaxial Interfaces
Wenrui Zhang, Shaobo Cheng, Christopher M Rouleau +7
Precise control of lattice mismatch accommodation and cation interdiffusion across the interface is critical to modulate correlated functionalities in epitaxial heterostructures, p…
Investigating phase transitions from local crystallographic analysis based on machine learning of atomic environments
Rama K. Vasudevan, Maxim Ziatdinov, Lukas Vlcek +8
Traditionally, phase transitions are explored using a combination of macroscopic functional characterization and scattering techniques, providing insight into average properties an…
Unraveling ferroelectric polarization and ionic contributions to electroresistance in epitaxial Hf0.5Zr0.5O2 tunnel junctions
Milena Cervo Sulzbach, Saúl Estandía, Xiao Long +7
Tunnel devices based on ferroelectric Hf0.5Zr0.5O2 (HZO) barriers hold great promises for emerging data storage and computing technologies. The resistance state of the device can b…
Domain Matching Epitaxy of Ferroelectric Hf0.5Zr0.5O2(111) on La2/3Sr1/3MnO3(001)
Saul Estandía, Nico Dix, Matthew F. Chisholm +2
Epitaxial ferroelectric HfO2 films are the most suitable to investigate intrinsic properties of the material and for prototyping emerging devices. Ferroelectric Hf0.5Zr0.5O2(111) f…
Rotational polarization nanotopologies in BaTiO3/SrTiO3 superlattices
Saul Estandia, Florencio Sanchez, Matthew F. Chisholm +1
Ferroelectrics are characterized by domain structures as are other ferroics. At the nanoscale though, ferroelectrics may exhibit non-trivial or exotic polarization configurations u…
Engineering Ferroelectric Hf0.5Zr0.5O2 Thin Films by Epitaxial Stress
Saul Estandia, Nico Dix, Jaume Gazquez +5
The critical impact of epitaxial stress on the stabilization of the ferroelectric orthorhombic phase of hafnia is proved. Epitaxial bilayers of Hf0.5Zr0.5O2 and La0.67Sr0.33MnO3 el…
Order and randomness in dopant distributions: exploring the thermodynamics of solid solutions from atomically resolved imaging
Lukas Vlcek, Shize Yang, Yongji Gong +6
Exploration of structure-property relationships as a function of dopant concentration is commonly based on mean field theories for solid solutions. However, such theories that work…
Single Crystal High Entropy Perovskite Oxide Epitaxial Films
Yogesh Sharma, Brianna L. Musico, Xiang Gao +10
The first examples of single crystal epitaxial thin films of a high entropy perovskite oxide are synthesized. Pulsed laser deposition is used to grow the configurationally disorder…
Intrinsic interfacial van der Waals monolayers and their effect on the high-temperature superconductor FeSe/SrTiO
Hunter Sims, Donovan N. Leonard, Axiel Yaël Birenbaum +6
The sensitive dependence of monolayer materials on their environment often gives rise to unexpected properties. It was recently demonstrated that monolayer FeSe on a SrTiO subs…
Nanoscale self-templating for oxide epitaxy with large symmetry mismatch
Xiang Gao, Shinbuhm Lee, John Nichols +4
Direct observations using scanning transmission electron microscopy unveil an intriguing interfacial bi-layer that enables epitaxial growth of a strain-free, monoclinic, bronze-pha…
Symmetry-driven atomic rearrangement at a brownmillerite-perovskite interface
Tricia L. Meyer, Hyoungjeen Jeen, Xiang Gao +3
Many of the recent advancements in oxide heterostructures have been attributed to modification of spin, charge, lattice, and orbital order parameters at atomically well-defined int…
Selective control of oxygen sublattice stability by epitaxial strain in Ruddlesden-Popper films
Tricia L. Meyer, Lu Jiang, Jaekwang Lee +8
Oxygen-defect control has long been considered an influential tuning knob for producing various property responses in complex oxide films. In addition to physical property changes,…
Orienting oxygen vacancies for fast catalytic reaction
Hyoungjeen Jeen, Zhonghe Bi, Woo Seok Choi +4
Catalysis is indispensable to chemical processes and relevant to many aspects of modern life. Owing to the intriguing electronic structures and good ionic properties, multivalent t…
Reversible redox reactions in an epitaxially stabilized SrCoOx oxygen sponge
Hyoungjeen Jeen, Woo Seok Choi, Michael D. Biegalski +8
Fast, reversible redox reactions in solids at low temperatures without thermomechanical degradation are a promising strategy for enhancing the overall performance and lifetime of m…
Atomic layer engineering of perovskite oxides for chemically sharp heterointerfaces
Woo Seok Choi, Christopher M. Rouleau, Sung Seok A. Seo +10
Advances in synthesis techniques and materials understanding have given rise to oxide heterostructures with intriguing physical phenomena that cannot be found in their constituents…
Wide band gap tunability in complex transition metal oxides by site-specific substitution
Woo Seok Choi, Matthew F. Chisholm, David J. Singh +3
Fabricating complex transition metal oxides with a tuneable band gap without compromising their intriguing physical properties is a longstanding challenge. Here we examine the laye…
Atomic-scale compensation phenomena at polar interfaces
Matthew F. Chisholm, Weidong Luo, Mark P. Oxley +2
The interfacial screening charge that arises to compensate electric fields of dielectric or ferroelectric thin films is now recognized as the most important factor in determining t…
Ferroelectricity in artificial bicolor oxide superlattices
Sung Seok A. Seo, Jun Hee Lee, Ho Nyung Lee +7
We report on the growth and properties of high quality bicolor oxide superlattices, composed of two perovskites out of BaTiO3, CaTiO3, and SrTiO3. The artificially grown superlatti…
Suppressed dependence of polarization on epitaxial strain in highly polar ferroelectrics
Ho Nyung Lee, Serge M. Nakhmanson, Matthew F. Chisholm +3
A combined experimental and computational investigation of coupling between polarization and epitaxial strain in highly polar ferroelectric PbZr_0.2Ti_0.8O_3 (PZT) thin films is re…