109 citations · 649 across the 32 of their papers we have counts for
34 papers
Enabling the Ambient Pressure Growth of ScB2 Crystals for AlGaN Power Electronics
Satya K. Kushwaha, Ahamed Raihan, Astrid D. Kengne +19
Here we report the growth of single crystalline ScB2, an ultrahigh-temperature ceramic, at ambient pressure in a laser-heated Optical Floating Zone via the travelling solvent metho…
Scandium diboride: a semi-metallic, lattice, thermally matched substrate for vertical AlGaN power electronics
MVS Chandrashekhar, Daniel Joel Harrison, Ahamed Raihan +22
We report the properties of hexagonal (space group P6/mmm) scandium diboride () single crystals grown by a laser diode floating zone method at growth rates of ~1mm/…
Atomic-Scale Characterization of Oxide Interfaces and Superlattices Using Scanning Transmission Electron Microscopy
Steven R. Spurgeon, Renae N. Gannon
Scanning transmission electron microscopy (STEM) is a cornerstone of our understanding of oxide interfaces and superlattices. No other technique provides the same level of insight…
Unsupervised segmentation of irradiation$\unicode{x2010}$induced order$\unicode{x2010}$disorder phase transitions in electron microscopy
Arman H Ter-Petrosyan, Jenna A Bilbrey, Christina M Doty +6
We present a method for the unsupervised segmentation of electron microscopy images, which are powerful descriptors of materials and chemical systems. Images are oversegmented into…
Isolation of Single Donors in ZnO
Ethan R. Hansen, Vasileios Niaouris, Bethany E. Matthews +6
The shallow donor in zinc oxide (ZnO) is a promising semiconductor spin qubit with optical access. Single indium donors are isolated in a commercial ZnO substrate using plasma focu…
Silicon-lattice-matched boron-doped gallium phosphide: A scalable acousto-optic platform
Nicholas S. Yama, I-Tung Chen, Srivatsa Chakravarthi +9
The compact size, scalability, and strongly confined fields in integrated photonic devices enable new functionalities in photonic networking and information processing, both classi…
Deep Learning for Automated Experimentation in Scanning Transmission Electron Microscopy
Sergei V. Kalinin, Debangshu Mukherjee, Kevin M. Roccapriore +9
Machine learning (ML) has become critical for post-acquisition data analysis in (scanning) transmission electron microscopy, (S)TEM, imaging and spectroscopy. An emerging trend is…
Evaluating Stage Motion for Automated Electron Microscopy
Kevin R. Fiedler, Matthew Olszta, Kayla Yano +4
Precise control is an essential and elusive quality of emerging self-driving microscopes. It is widely understood these instruments must be capable of performing rapid, high-volume…
Jahn-Teller-driven Phase Segregation in MnCoO Spinel Thin Films
Miles D. Blanchet, Bethany E. Matthews, Steven R. Spurgeon +3
Transition metal spinel oxides comprised of Earth-abundant Mn and Co have long been explored for their use in catalytic reactions and energy storage. However, understanding of func…
Resolving diverse oxygen transport pathways across Sr-doped lanthanum ferrite and metal-perovskite heterostructures
Sandra D. Taylor, Kayla H. Yano, Michel Sassi +7
Perovskite structured transition metal oxides are important technological materials for catalysis and solid oxide fuel cell applications. Their functionality often depends on oxyge…
Free-Standing Epitaxial SrTiO Nanomembranes via Remote Epitaxy using Hybrid Molecular Beam Epitaxy
Hyojin Yoon, Tristan K. Truttmann, Fengdeng Liu +12
The epitaxial growth of functional materials using a substrate with a graphene layer is a highly desirable method for improving structural quality and obtaining free-standing epita…
Deep-learning-based prediction of nanoparticle phase transitions during in situ transmission electron microscopy
Wenkai Fu, Steven R. Spurgeon, Chongmin Wang +3
We develop the machine learning capability to predict a time sequence of in-situ transmission electron microscopy (TEM) video frames based on the combined long-short-term-memory (L…
Hybrid Molecular Beam Epitaxy of Ge-based Oxides
Fengdeng Liu, Tristan K Truttmann, Dooyong Lee +6
Germanium-based oxides such as rutile GeO2 are garnering attention owing to their wide band gaps and the prospects for ambipolar doping for application in high-power devices. Here,…
Oxygen Reduction Electrocatalysis with Epitaxially Grown Spinel MnFeO and FeO
Alexandria R. C. Bredar, Miles D. Blanchet, Andricus R. Burton +4
Nanocrystalline MnFeO has shown promise as a catalyst for the oxygen reduction reaction (ORR) in alkaline solutions, but the material has been lightly studied as highly…
Surface Stability of SrNbO Grown by Hybrid Molecular Beam Epitaxy
Suresh Thapa, Sydney Provence, Steve M. Heald +2
4d transition metal oxides have emerged as promising materials for numerous applications including high mobility electronics. SrNbO is one such candidate material, serving as…
An Automated Scanning Transmission Electron Microscope Guided by Sparse Data Analytics
Matthew Olszta, Derek Hopkins, Kevin R. Fiedler +3
Artificial intelligence (AI) promises to reshape scientific inquiry and enable breakthrough discoveries in areas such as energy storage, quantum computing, and biomedicine. Scannin…
Thickness Dependent OER Electrocatalysis of Epitaxial LaFeO Thin Films
Andricus R. Burton, Rajendra Paudel, Bethany Matthews +4
Transition metal oxides have long been an area of interest for water electrocatalysis through the oxygen evolution and oxygen reduction reactions. Iron oxides, such as LaFeO,…
Design of a Graphical User Interface for Few-Shot Machine Learning Classification of Electron Microscopy Data
Christina Doty, Shaun Gallagher, Wenqi Cui +5
The recent growth in data volumes produced by modern electron microscopes requires rapid, scalable, and flexible approaches to image segmentation and analysis. Few-shot machine lea…
Tuning band alignment at a semiconductor-crystalline oxide heterojunction via electrostatic modulation of the interfacial dipole
M. Chrysler, J. Gabel, T. -L. Lee +14
We demonstrate that the interfacial dipole associated with bonding across the SrTiO3/Si heterojunction can be tuned through space charge, thereby enabling the band alignment to be…
Percolation of Ion-Irradiation-Induced Disorder in Complex Oxide Interfaces
Bethany Matthews, Michel Sassi, Christopher M. Barr +5
Mastery of order-disorder processes in highly non-equilibrium nanostructured oxides has significant implications for the development of emerging energy technologies. However, we ar…
Order-Disorder Behavior at Thin Film Oxide Interfaces
Steven R. Spurgeon
Order-disorder processes fundamentally determine the structure and properties of many important oxide systems for energy and computing applications. While these processes have been…
Scanning Transmission Electron Microscopy of Oxide Interfaces and Heterostructures
Steven R. Spurgeon
Thin film oxides are a source of endless fascination for the materials scientist. These materials are highly flexible, can be integrated into almost limitless combinations, and exh…
Microscopic model of stacking-fault potential and exciton wave function in GaAs
Mikhail V. Durnev, Mikhail M. Glazov, Xiayu Linpeng +7
Two-dimensional stacking fault defects embedded in a bulk crystal can provide a homogeneous trapping potential for carriers and excitons. Here we utilize state-of-the-art structura…
Asymmetric Lattice Disorder Induced at Oxide Interfaces
Steven R. Spurgeon, Tiffany C. Kaspar, Vaithiyalingam Shutthanandan +3
Control of order-disorder phase transitions is a fundamental materials science challenge, underpinning the development of energy storage technologies such as solid oxide fuel cells…