235 citations · 1.8k across the 36 of their papers we have counts for
25 papers · 1 filter
Emergent magnetism with continuous control in the ultrahigh conductivity layered oxide PdCoO2
Matthew Brahlek, Alessandro R. Mazza, Abdulgani Annaberdiyev +20
The current challenge to realizing continuously tunable magnetism lies in our inability to systematically change properties such as valence, spin, and orbital degrees of freedom as…
Tuning Structural, Transport and Magnetic Properties of Epitaxial SrRuO3 through Ba-Substitution
Zeeshan Ali, Zhen Wang, Alessandro R. Mazza +5
The perovskite ruthenates (ARuO3, A = Ca, Ba, or Sr) exhibit unique properties owing to a subtle interplay of crystal structure and electronic-spin degrees of freedom. Here, we dem…
What is in a Name: Defining -High Entropy- Oxides
Matthew Brahlek, Maria Gazda, Veerle Keppens +10
High entropy oxides are emerging as an exciting new avenue to design highly tailored functional behaviors that have no traditional counterparts. Study and application of these mate…
Surface-Driven Evolution of the Anomalous Hall Effect in Magnetic Topological Insulator MnBi2Te4 Thin Films
Alessandro R. Mazza, Jason Lapano, Harry M. Meyer +11
Understanding the effects of interfacial modification to the functional properties of magnetic topological insulator thin films is crucial for developing novel technological applic…
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…
High Entropy Oxide Relaxor Ferroelectrics
Yogesh Sharma, Min-Cheol Lee, Krishna C. Pitike +13
Relaxor ferrolectrics are important in technological applications due to a strong electromechanical response, energy storage capacity, electrocaloric effect, and pyroelectric energ…
Magnetic Texture in Insulating Single Crystal High Entropy Oxide Spinel Films
Yogesh Sharma, Alessandro R. Mazza, Brianna L. Musico +10
Magnetic insulators are important materials for a range of next generation memory and spintronic applications. Structural constraints in this class of devices generally require a c…
Adsorption-controlled growth of MnTe(Bi2Te3)n by molecular beam epitaxy exhibiting stoichiometry-controlled magnetism
Jason Lapano, Lauren Nuckols, Alessandro R. Mazza +12
We report the growth of the intrinsic magnetic topological system MnTe(Bi2Te3)n by molecular beam epitaxy. By mapping the temperature and the Bi:Mn flux ratio, it is shown that the…
Strong spin-dephasing in a topological insulator - paramagnet heterostructure
Jason Lapano, Alessandro R. Mazza, Haoxiang Li +9
The interface between magnetic materials and topological insulators can drive the formation of exotic phases of matter and enable functionality through manipulation of the strong s…
Applying configurational complexity to the 2D Ruddlesden-Popper crystal structure
Wenrui Zhang, Alessandro R. Mazza, Elizabeth Skoropata +11
The 2D layered Ruddlesden-Popper crystal structure can host a broad range of functionally important behaviors. Here we establish extraordinary configurational disorder in a two dim…
Self-Assembled Room Temperature Multiferroic BiFeO3-LiFe5O8 Nanocomposites
Yogesh Sharma, Radhe Agarwal, Liam Collins +11
Multiferroic materials have driven significant research interest due to their promising technological potential. Developing new room-temperature multiferroics and understanding the…
Growth of metallic delafossite PdCoO2 by molecular beam epitaxy
Matthew Brahlek, Gaurab Rimal, Jong Mok Ok +8
The Pd, and Pt based ABO2 delafossites are a unique class of layered, triangular oxides with 2D electronic structure and a large conductivity that rivals the noble metals. Here, we…
Exploiting symmetry-mismatch to control magnetism in a ferroelastic heterostructure
Er-Jia Guo, Ryan Desautels, Dongkyu Lee +11
In the bulk, LaCoO3 (LCO) is a paramagnet, yet in tensile strained thin films at low temperature ferromagnetism (FM) is observed, and its origin remains unresolved. Polarized neutr…
Nanoscale ferroelastic twins formed in strained LaCoO3 films
Er-Jia Guo, Ryan Desautels, David Keavney +9
The coexistence and coupling of ferroelasticity and magnetic ordering in a single material offers a great opportunity to realize novel devices with multiple tuning knobs. Complex o…
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…
Full Electroresistance Modulation in a Mixed-Phase Metallic Alloy
Z. Q. Liu, L. Li, Z. Gai +11
We report a giant, ~22%, electroresistance modulation for a metallic alloy above room temperature. It is achieved by a small electric field of 2 kV/cm via piezoelectric strain-medi…
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…
Dynamic defect correlations dominate activated electronic transport in SrTiO3
Paul C. Snijders, Cengiz Şen, Michael P. McConnell +5
Strontium titanate (SrTiO3, STO) is a critically important material for the study of emergent electronic phases in complex oxides, as well as for the development of applications ba…
Persistent metal-insulator transition at the surface of an oxygen-deficient, epitaxial manganite film
Paul C. Snijders, Min Gao, Hangwen Guo +6
The oxygen stoichiometry has a large influence on the physical and chemical properties of complex oxides. Most of the functionality in e.g. catalysis and electrochemistry depends i…
Structural and electronic origin of the magnetic structures in hexagonal LuFeO
Hongwei Wang, Igor V. Solovyev, Wenbin Wang +11
Using combined theoretical and experimental approaches, we studied the structural and electronic origin of the magnetic structure in hexagonal LuFeO. Besides showing the strong…
Active control of magnetoresistance of organic spin valves using ferroelectricity
Dali Sun, Mei Fang, Xiaoshan Xu +11
Organic spintronic devices have been appealing because of the long spin life time of the charge carriers in the organic materials and their low cost, flexibility and chemical diver…
Dynamics of a first order electronic phase transition in manganites
T. Z. Ward, Z. Gai, H. W. Guo +2
By reducing an electronically phase separated manganite (La[1-y]Pr[y])[x]Ca[1-x]MnO3 single crystal thin film to dimensions on the order of the inherent phase domains, it is possib…
Growth diagram of La0.7Sr0.3MnO3 thin films using pulsed laser deposition
Hangwen Guo, Dali Sun, Wenbin Wang +9
An experimental study was conducted on controlling the growth mode of La0.7Sr0.3MnO3 thin films on SrTiO3 substrates using pulsed laser deposition (PLD) by tuning growth temperatur…
Room-temperature multiferroic hexagonal LuFeO films
Wenbin Wang, Jun Zhao, Wenbo Wang +15
The crystal and magnetic structures of single-crystalline hexagonal LuFeO films have been studied using x-ray, electron and neutron diffraction methods. The polar structure of…