2025/05/20(Tue) 10:30 -12:00 P101會議室 1F, P101 Meeting Room
Title
Mesoscale Imaging and Modeling of Stimulus-Driven Phase Transformations in Quantum Materials
Speaker
劉懿德博士 (國立成功大學物理系) Dr. Yi-De Liou (Department of Physics, National Cheng Kung University)Abstract
Understanding how external stimuli dynamically alter the physical properties of quantum materials remains a central challenge in condensed matter physics. Systems such as complex oxides, heterostructures, and 2D materials exhibit emergent phenomena—including multiferroicity, topologically stabilized textures, and stimulus-driven electronic responses—arising from intricate couplings among electronic, structural, and magnetic degrees of freedom. These phenomena provide a platform for stimulus-response evaluation, material optimization, and novel device applications. However, the underlying mechanisms that drive nanoscale dynamic processes and their connection to mesoscale behaviors remain elusive.
This talk introduces an integrated approach that combines advanced scanning probe microscopy (SPM) and phase-field modeling to investigate these dynamic processes. In situ manipulation via SPM enables direct visualization and nanoscale characterization of microstructure evolution, topological textures, strong correlation effects, and low-dimensional materials, revealing how local structural and electronic configurations respond to external stimuli. Complementary phase-field simulations provide a dynamic modeling framework that captures the fundamental physical principles governing order parameter dynamics, domain wall motion, and topological transition. By uniting experimental observations with computational modeling, this approach enables mechanistic validation and predictive insight into emergent phenomena—such as non-volatile switching and stimulus-driven phase transitions—illuminating how external stimuli shape phase behavior in quantum materials and connect nanoscale dynamics to macroscopic functionalities in strongly correlated and low-dimensional systems.
Language
演講語言 (Language): in English
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