Vladimir Alexandru Stoica

Decoding THz‐Driven Dynamic Fingerprints of Ferroelectric Nanotwin Networks

Xiaojiang Li, Andrés Ross, Vladimir Alexandru Stoica, Sujit Das et autres

ABSTRACT Ultrafast polarization dynamics in ferroelectrics are of considerable interest for high‐speed tunable dielectrics and electro‐optics. Extended domain wall networks formed in ferroelectric twin nanodomains can support collective dynamics in the terahertz regime but require techniques that track polarization and strain evolution …

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Decoding THz-Driven Dynamic Fingerprints of Ferroelectric Nanotwin Networks

Vladimir Alexandru Stoica, Aiden Ross, Xiaojiang Li

Data from Figures

Colossal Cryogenic Electro‐Optic Response Through Metastability in Strained BaTiO 3 Thin Films

Albert Suceava, Sankalpa Hazra, Aiden Ross, Ian Reed Philippi et autres

Abstract The search for thin film electro‐optic materials that can retain superior performance under cryogenic conditions has become critical for quantum computing. Barium titanate thin films show large linear electro‐optic coefficients in the tetragonal phase at room temperature, which is severely degraded …

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Terahertz-field activation of polar skyrons

Huaiyu Hugo Wang, Vladimir Alexandru Stoica, Cheng Dai, Marek Paściak et autres

Unraveling collective modes arising from coupled degrees of freedom is crucial for understanding complex interactions in solids and developing new functionalities. Unique collective behaviors emerge when two degrees of freedom, ordered on distinct length scales, interact. Polar skyrmions, three-dimensional electric polarization textures …

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Hidden domain boundary dynamics toward crystalline perfection

Anudeep Mangu, Vladimir Alexandru Stoica, Hao Ran Zheng, Tiannan Yang et autres

A central paradigm of nonequilibrium physics concerns the dynamics of heterogeneity and disorder, impacting processes ranging from the behavior of glasses to the emergent functionality of active matter. Understanding these complex mesoscopic systems requires probing the microscopic trajectories associated with irreversible processes, …

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Colossal Strain Tuning of Ferroelectric Transitions in KNbO 3 Thin Films

Sankalpa Hazra, Tobias Schwaigert, Aiden Ross, Haidong Lu et autres

Abstract Strong coupling between polarization ( P ) and strain (ɛ) in ferroelectric complex oxides offers unique opportunities to dramatically tune their properties. Here colossal strain tuning of ferroelectricity in epitaxial KNbO 3 thin films grown by sub‐oxide molecular beam epitaxy is …

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Author Correction: Non-equilibrium pathways to emergent polar supertextures

Vladimir Alexandru Stoica, Tiannan Yang, Sujit Das, Yue Cao et autres

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Non-equilibrium pathways to emergent polar supertextures

Vladimir Alexandru Stoica, Tiannan Yang, Sujit Das, Yue Cao et autres

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Optical Control of Adaptive Nanoscale Domain Networks

Marc Zajac, Tao Zhou, Tiannan Yang, Sujit Das et autres

Abstract Adaptive networks can sense and adjust to dynamic environments to optimize their performance. Understanding their nanoscale responses to external stimuli is essential for applications in nanodevices and neuromorphic computing. However, it is challenging to image such responses on the nanoscale with …

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Optical Control of Adaptive Nanoscale Domain Networks

Marc Zajac, Tao Zhou, Tiannan Yang, Sujit Das et autres

Adaptive networks can sense and adjust to dynamic environments to optimize their performance. Understanding their nanoscale responses to external stimuli is essential for applications in nanodevices and neuromorphic computing. However, it is challenging to image such responses on the nanoscale with crystallographic …

In‐Operando Spatiotemporal Imaging of Coupled Film‐Substrate Elastodynamics During an Insulator‐to‐Metal Transition

Greg Stone, Yin Shi, Matthew Jerry, Vladimir Alexandru Stoica et autres

Abstract The drive toward non‐von Neumann device architectures has led to an intense focus on insulator‐to‐metal (IMT) and the converse metal‐to‐insulator (MIT) transitions. Studies of electric field‐driven IMT in the prototypical VO2 thin‐film channel devices are largely focused on the electrical and …

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Non-equilibrium pathways to emergent polar supertextures

Vladimir Alexandru Stoica, Tiannan Yang, Sujit Das, Yue Cao et autres

Ultrafast stimuli can stabilize metastable states of matter inaccessible by equilibrium means. Establishing the spatiotemporal link between ultrafast excitation and metastability is crucial to understanding these phenomena. Here, we use single-shot optical-pump, X-ray-probe measurements to provide snapshots of the emergence of a …