We focus on modeling and predicting the formation and evolution of materials microstructure and microstructure-property relationship by both phase-field modeling and machine learning.
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RECENT NEWSApril 3, 2024
Shihao's first-authored paper "Hybrid magnon-phonon cavity for large-amplitude terahertz spin-wave excitation" was published in Physical Review Applied! We theoretically demonstrate that a freestanding metal/magnetic insulator (MI)/dielectric multilayer can be designed to produce large-amplitude THz spin waves via cavity-enhanced magnon-phonon interactions. The amplitude of the acoustically excited THz spin wave in the freestanding multilayer is predicted to be more than 10 times larger than in a substrate-supported multilayer. We greatly appreciate the insights from the coauthors. The dynamical phase-field simulations were also performed using our in-house GPU-accelerated Open-source Ferroics dynamics modeling package (Go-Ferro). March 15, 2024 Congratulations to Taorui for his first-authored paper "Analytical model and dynamical phase-field simulation of terahertz transmission across ferroelectrics" published on Physical Review B! We greatly appreciate the insights from the collaborators! Typically, the study of the interaction between THz light and ferroelectrics centers on what is happening or what would happen afterwards followed by THz excitation. This work is instead focused on THz wave, where ferroelectrics are utilized to modulate the phase, polarization, and amplitude of the incident THz wave in a passive, and source-current-free (thus low power dissipation) fashion, with potential application to high-data-rate wireless communication and beyond. The dynamical phase-field simulations were also performed using our in-house GPU-accelerated Open-source Ferroics dynamics modeling package (Go-Ferro). March 12, 2024 Shihao's collaborative paper "Slow-Wave Hybrid Magnonics" was published in Physical Review Letters! We appreciate the opportunity to collaborate. In this work, we performed dynamical phase-field simulations, via our in-house GPU-accelerated Open-source Ferroics dynamics modeling package (Go-Ferro) to simulate the time-domain dynamics of coherently coupled magnon and spoof surface plasmon polaritons (SSPP) in planar waveguide devices. Sept 8, 2023 Congratulations to Minyi for her first-authored paper "Graph Neural Network for Predicting the Effective Properties of Polycrystalline Materials: A Comprehensive Analysis" published in Computational Materials Science and co-authored paper "Field-free Spin-orbit switching of Perpendicular Magnetization enabled by dislocation-induced in-plane symmetry breaking" published on Nature Communications! May 30, 2023 Shihao's collaborative paper "Machine learning-enabled superior energy storage in ferroelectric film with a slush-like polar state" was published in Nano Letters! We appreciate the opportunity to collaborate. In this work, we performed phase-field simulations to model the polarization domains structure and their switching in doped and undoped BZT-BCT ferroelectric solid solution thin film. The results are consistent with P-E loop and TEM measurement. April 26, 2023 Two new papers published on the same day! Please check Jiamian's co-authored perspective article together with Kawasaki group "Strain and strain gradient engineering in membranes of quantum materials", and Minyi's collaborative paper "A puzzling insensitivity of magnon spin diffusion to the presence of 180-degree domain walls" published in Nature Communications, where Minyi used micromagnetic modeling to simulate the magnetic domain switching in MgAl0.5Fe1.5O4 thin films that agree with experiments. Jan 26, 2023 Minyi's collaborative paper "Significant Unconventional Anomalous Hall Effect in Heavy metal/Antiferromagnetic Insulator heterostructures" was published in Advanced Science! We appreciate the opportunity to collaborate. In this work, Minyi was able to simulate the chiral spin texture in NiO (with a thin Pt top layer) using MuMax3 by converting an atomistic spin Hamiltonian into a continuum magnetic free energy. Jan. 12, 2023 Dr. Jiamian Hu received the NSF CAREER award from the Condensed Matter and Materials Theory program within the Division of Materials Research! We greatly appreciate the support from the NSF and the community! Jan. 9, 2023 Shihao's another first-authored paper "Acoustic attenuation in magnetic insulator films: effects of magnon polaron formation" was published in Journal of Physics D: Applied Physics! We hope our time-domain simulations can provide new insights into the old problem on the attenuation of an acoustic wave in magnetic media! Jan 3, 2023 Mojue and Minyi's collaborative paper "Bicontinuous oxide heteroepitaxy with enhanced photoconductivity" was published in Nature Communications! We appreciate the opportunity to collaborate. It was always fun to use phase-field simulations to investigate fundamental materials science problems like nucleation and growth and spinodal decomposition, and generate digital twins of real microstructures! Oct. 18, 2022 Shihao's first-authored paper "Role of polarization-photon coupling in ultrafast terahertz excitation of ferroelectrics" was published as a Letter in Physical Review B! In this work, we developed an analytical theory and a new dynamical phase-field model to quantify the role of polarization-photon coupling in ultrafast THz excitation of ferroelectrics. We show that considering such coupling is necessary to achieve a correct theoretical description and an accurate computation-guided design of ultrafast THz excitation experiments in solids. Aug. 11, 2022 Shihao's first-authored paper "Excitation and detection of coherent sub-terahertz magnons in ferromagnetic and antiferromagnetic heterostructures" was published in npj Computational Materials! The predictions in this paper were made based on an in-house GPU (Graphics Processing Unit)-accelerated dynamical phase-field model that considers the coupled dynamics of acoustic phonons, magnons, photons, and plasmons. May 28, 2022 Group photo after BBQ at Devil's lake! May 16, 2022 Dr. Jiamian Hu was selected as the recipient of the 2022 Robert L. Coble Award for Young Scholars from the American Ceramic Society (ACerS)! (News) |
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