128 citations · 535 across the 24 of their papers we have counts for
24 papers
Optical poling of a quantum ferroelectric metal across the order-disorder phase transition
Mohamed Kandil, Yasuhide Tomioka, Yafei Ren +3
Electron-doped strontium titanate has emerged as a prototypical quantum ferroelectric metal. It provides a fertile ground to explore how ferroelectric instability intertwined with…
Revealing the Evolution of Order in Materials Microstructures Using Multi-Modal Computer Vision
Arman Ter-Petrosyan, Michael Holden, Jenna A. Bilbrey +11
The development of high-performance materials for microelectronics, energy storage, and extreme environments depends on our ability to describe and direct property-defining microst…
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…
Band-Engineered LaFeO-LaNiO Thin Film Interfaces for Electrocatalysis of Water
Rajendra Paudel, Andricus R. Burton, Marcelo A. Kuroda +2
Transition metal oxides have generated significant interest for their potential as catalysts for the oxygen evolution reaction (OER) in alkaline environments. Iron and nickel-based…
High Mobility Two-Dimensional Electron Gas at the BaSnO/SrNbO Interface
Sharad Mahatara, Suresh Thapa, Hanjong Paik +2
Oxide two-dimensional electron gases (2DEGs) promise high charge carrier concentrations and low-loss electronic transport in semiconductors such as BaSnO (BSO). ACBN0 computa…
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…
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,…
Self-regulated growth of candidate topological superconducting parkerite by molecular beam epitaxy
Jason Lapano, Yun-Yi Pai, Alessandro Mazza +17
Ternary chalcogenides such as the parkerites and shandites are a broad class of materials exhibiting rich diversity of transport and magnetic behavior as well as an array of topolo…
Probing Emergent Surface and Interfacial Properties in Complex Oxides via in situ X-ray Photoelectron Spectroscopy
Suresh Thapa, Rajendra Paudel, Miles D. Blanchet +2
Emergent behavior at complex oxide interfaces has driven much of the research in the oxide thin film community for the past twenty years. Interfaces have been engineered for potent…
Correlating surface stoichiometry and termination in SrTiO films grown by hybrid molecular beam epitaxy
Suresh Thapa, Sydney R. Provence, Devin Jessup +6
Hybrid oxide molecular beam epitaxy (hMBE), a thin-film deposition technique in which transition metal cations are delivered using a metal-organic precursor, has emerged as the sta…
Machine Learning Analysis of Perovskite Oxides Grown by Molecular Beam Epitaxy
Sydney R. Provence, Suresh Thapa, Rajendra Paudel +4
Reflection high-energy electron diffraction (RHEED) is a ubiquitous in situ molecular beam epitaxial (MBE) characterization tool. Although RHEED can be a powerful means for crystal…
Interface properties and built-in potential profile of a LaCrO/SrTiO superlattice determined by standing-wave excited photoemission spectroscopy
Shih-Chieh Lin, Cheng-Tai Kuo, Ryan B. Comes +14
LaCrO (LCO) / SrTiO (STO) heterojunctions are intriguing due to a polar discontinuity along (001), two distinct and controllable interface structures [(LaO)/(TiO)$^…
Dynamic Interface Rearrangement in LaFeO / -SrTiO Heterojunctions
Steven R. Spurgeon, Peter V. Sushko, Ryan B. Comes +1
Thin film synthesis methods developed over the past decades have unlocked emergent interface properties ranging from conductivity to ferroelectricity. However, our attempts to exer…
Interface structure, band alignment and built-in potentials at LaFeO/-SrTiO heterojunctions
Ryan Comes, Scott Chambers
Interface structure at polar/non-polar interfaces has been shown to be a key factor in controlling emergent behavior in oxide heterostructures, including the LaFeO/…
Interface-induced Polarization in SrTiO-LaCrO Superlattices
Ryan B. Comes, Steven R. Spurgeon, Steve M. Heald +7
Epitaxial interfaces and superlattices comprised of polar and non-polar perovskite oxides have generated considerable interest because they possess a range of desirable properties…
Exchange Bias and Bistable Magneto-Resistance States in Amorphous TbFeCo thin Films
Xiaopu Li, Chung T. Ma, Jiwei Lu +4
Amorphous TbFeCo thin films sputter deposited at room temperature on thermally oxidized Si substrate are found to exhibit strong perpendicular magnetic anisotropy (PMA). Atom probe…
Directed Self-Assembly of Epitaxial CoFe2O4-BiFeO3 Multiferroic Nanocomposites
Ryan Comes, Hongxue Liu, Mikhail Khokhlov +3
CoFeO (CFO)-BiFeO (BFO) nanocomposites are an intriguing option for future memory and logic technologies due to the magnetoelctric properties of the system.…
Infrared Optical Absorption in Low-spin Fe-doped SrTiO
Ryan B. Comes, Tiffany C. Kaspar, Steve M. Heald +2
Band gap engineering in SrTiO and related titanate perovskites has long been explored due to the intriguing properties of the materials for photocatalysis and photovoltaic…
Band alignment of epitaxial SrTiO3 thin films with (LaAlO3)0.3-(Sr2AlTaO6)0.7 (001)
Ryan B. Comes, Peng Xu, Bharat Jalan +1
SrTiO (STO) epitaxial thin films and heterostructures are of considerable interest due to the wide range of functionalities they exhibit. The alloy perovskite (LaAlO)$_…
Visible light carrier generation in co-doped epitaxial titanate films
Ryan B. Comes, Sergey Y. Smolin, Tiffany C. Kaspar +6
Perovskite titanates such as SrTiO (STO) exhibit a wide range of important functional properties, including high electron mobility, ferroelectricity, and excellent photocatal…
Microstructural Effects of Chemical Island Templating in Patterned Matrix-Pillar Oxide Nanocomposites
Ryan B. Comes, Kerry Siebein, Jiwei Lu +1
The ability to pattern the location of pillars in epitaxial matrix-pillar nanocomposites is a key challenge to develop future technologies using these intriguing materials. One suc…
A versatile variable field module for field and angular dependent scanning probe microscopy measurements
Hongxue Liu, Ryan Comes, Jiwei Lu +3
We demonstrate a versatile variable field module (VFM) with capability of both field and angular dependent measurements up to 1800 Oe for scanning probe system. The magnetic field…
Structural, magnetic, and nanoscale switching properties of BiFeO3 thin films grown by pulsed electron deposition
Hongxue Liu, Ryan Comes, Yonghang Pei +2
We report the epitaxial growth of BiFeO3 by pulsed electron deposition and the resulting crystal quality, magnetic and nanoscale switching properties. X-ray diffraction shows high…