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March 27, 2024Open Access

Octahedral and polar phase transitions in freestanding films of SrTiO3

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Authors

LLLudmila LeroyPaul Scherrer InstituteSHShih‐Wen HuangPaul Scherrer InstituteCCChun‐Chien ChiuNational Cheng Kung University

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Implication

Spectroscopic and structural analysis reveals a polar transition at 85 K in freestanding strontium titanate films, indicating strong deviations from bulk quantum paraelectric behavior.

Key Points

  • Relaxed freestanding films of strontium titanate exhibit a polar state at temperatures up to 85 K, contrasting with the quantum paraelectric behavior observed in bulk material.
  • The ferroelectric mode softens toward the critical transition temperature of 85 K across all film thicknesses, confirming the formation of a robust ferroelectric ground state.
  • Analysis using thz time domain spectroscopy and x ray diffraction demonstrates enhanced octahedral rotations, indicating that dimensionality modifies oxide perovskite properties.

Cite This Study

Leroy et al. (2024) studied this question.

synapsesocial.com/papers/68e7230db6db64358769d410https://doi.org/10.48550/arxiv.2403.18577
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