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Significance We find that the amplitude of the thermal Hall effect (THE) in strontium titanate drastically varies with atomic substitution. It is suppressed when Sr is substituted by Ca, pointing… Click to show full abstract
Significance We find that the amplitude of the thermal Hall effect (THE) in strontium titanate drastically varies with atomic substitution. It is suppressed when Sr is substituted by Ca, pointing to the role of ferroelectric fluctuations in generating THE. It is amplified by removing oxygen atoms and the emergence of dilute metallicity. In the latter case, we identify a source of the THE, which is phonon drag in the context of an exceptionally large electronic Hall angle.
Keywords:
strontium titanate;
hall effect;
phonon drag;
hall;
thermal hall
Journal Title: Proceedings of the National Academy of Sciences of the United States of America
Year Published: 2022
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Journal Title: Proceedings of the National Academy of Sciences of the United States of America
Year Published: 2022
Link to full text (if available)
Share on Social Media: Sign Up to like & get
recommendations!