12 citations · 43 across the 15 of their papers we have counts for
15 papers
Anion Ordering and Phase Stability Govern Optical Band Gaps in BaZr(S,Se)3
Erik Fransson, Michael Xu, Prakriti Kayastha +6
Chalcogenide perovskites have emerged as promising lead free materials for photovoltaic and thermoelectric applications. Among them, BaZrS3 has attracted particular attention due t…
Direct determination of antiferroelectric-to-ferroelectric phase transition pathways in PbZrO with Operando Electron Microscopy
Menglin Zhu, Michael Xu, Louis Alaerts +5
Under a sufficiently high applied electric field, a non-polar antiferroelectric material, such as \ce{PbZrO3}, can undergo a rapid transformation to a polar ferroelectric phase. Wh…
Operando Electron Microscopy of Nanoscale Electronic Devices on Non-Conductive Substrates
Menglin Zhu, Michael Xu, Zishen Tian +7
Achieving operating conditions comparable to ``bulk'' electronic devices, such as thin film capacitors, during \textit{operando} electron microscopy remains challenging, particular…
Sensitivity of Multislice Electron Ptychography to Point Defects: A Case Study in SiC
Aaditya Bhat, Colin Gilgenbach, Junghwa Kim +3
Here, we evaluate multislice electron ptychography as a tool to carry out depth-resolved atomic resolution characterization of point defects, using silicon carbide as a case study.…
Bridging experiment and theory of relaxor ferroelectrics at the atomic scale with multislice electron ptychography
Menglin Zhu, Michael Xu, Yubo Qi +7
Introducing structural and/or chemical heterogeneity into otherwise ordered crystals can dramatically alter material properties. Lead-based relaxor ferroelectrics are a prototypica…
Atomic Structure of Self-Buffered BaZr(S,Se) Epitaxial Thin Film Interfaces
Michael Xu, Kevin Ye, Ida Sadeghi +2
Understanding and controlling the growth of chalcogenide perovskite thin films through interface design is important for tailoring film properties. Here, the film and interface str…
Additively manufacturable high-strength aluminum alloys with thermally stable microstructures enabled by hybrid machine learning-based design
S. Mohadeseh Taheri-Mousavi, Michael Xu, Florian Hengsbach +8
Additively manufactured (AM) aluminum alloys with high strength and thermal stability have broad applications in turbine engines, vacuum pumps, heat exchangers, and many other indu…
A Processing Route to Chalcogenide Perovskites Alloys with Tunable Band Gap via Anion Exchange
Kevin Ye, Ida Sadeghi, Michael Xu +6
We demonstrate synthesis of BaZr(S,Se)3 chalcogenide perovskite alloys by selenization of BaZrS3 thin films. The anion-exchange process produces films with tunable composition and…
Insights into Chemical and Structural Order at Planar Defects in a Functional Oxide Using Multislice Electron Ptychography
Menglin Zhu, Michael Xu, Yu Yun +7
Switchable order parameters in ferroic materials are essential for functional electronic devices, yet disruptions of the ordering can take the form of planar boundaries or defects…
Validation of machine-learned interatomic potentials via temperature-dependent electron thermal diffuse scattering
Dennis S. Kim, Michael Xu, James M. LeBeau
Machine-learned interatomic potentials (MLIPs) show promise in accurately describing the physical properties of materials, but there is a need for a higher throughput method of val…
Determination of Local Short-Range Order in TiVNbHf(Al)
Michael Xu, Shaolou Wei, Cemal C. Tasan +1
The presence of short-range chemical order can be a key factor in determining the mechanical behavior of metals, but directly and unambiguously determining its distribution in comp…
A new semiconducting perovskite alloy system made possible by gas-source molecular beam epitaxy
Ida Sadeghi, Jack Van Sambeek, Tigran Simonian +5
Optoelectronic technologies are based on families of semiconductor alloys. It is rare that a new semiconductor alloy family is developed to the point where epitaxial growth is poss…
Correlating Local Chemical and Structural Order Using Geographic Information Systems-Based Spatial Statistics
Michael Xu, Abinash Kumar, James M. LeBeau
Analysis of nanoscale short-range chemical and/or structural order via (scanning) transmission electron microscopy (S/TEM) imaging is fundamentally limited by projection of the thr…
Towards Augmented Microscopy with Reinforcement Learning-Enhanced Workflows
Michael Xu, Abinash Kumar, James M. LeBeau
Here, we report a case study implementation of reinforcement learning (RL) to automate operations in the scanning transmission electron microscopy (STEM) workflow. To do so, we des…
Making BaZrS3 chalcogenide perovskite thin films by molecular beam epitaxy
Ida Sadeghi, Kevin Ye, Michael Xu +2
We demonstrate the making of BaZrS3 thin films by molecular beam epitaxy (MBE). BaZrS3 forms in the orthorhombic distorted-perovskite structure with corner-sharing ZrS6 octahedra.…