Intrinsic versus defect-driven phonon thermal Hall effect in SrTiO_3 · revision history

Revision 2

Accepted · core change · record

Changes against revision 1:

Title · changed
Revision 1: Intrinsic versus defect-driven phonon thermal Hall effect in SrTiO3
Revision 2: Intrinsic versus defect-driven phonon thermal Hall effect in $\mathrm{SrTiO_3}$
Plain · changed
Revision 1: The effect could come from the phonons themselves or from the way they scatter off impurities. SrTiO3, where it is large, is a clean place to decide.
Revision 2: The effect could come from the phonons themselves or from the way they scatter off impurities. $\mathrm{SrTiO_3}$, where it is large, is a clean place to decide.
Precise · changed · core
Revision 1: For SrTiO3 with $\kappa_{xy}/\kappa_{xx}$ up to $\sim 3e-3$ at $9e4\,\mathrm{G}$ near the $\kappa_{xx}$ maximum, determine whether $\kappa_{xy}$ arises from band-intrinsic phonon chirality (for example involving the soft polar mode and structural domains) or from extrinsic skew scattering, by establishing how $\kappa_{xy}$ scales with $\kappa_{xx}$ and with controlled defect density (oxygen vacancies, isotope substitution).
Revision 2: For $\mathrm{SrTiO_3}$ with $\kappa_{xy}/\kappa_{xx}$ up to $\sim 3 \times 10^{-3}$ at $9 \times 10^{4}\,\mathrm{G}$ near the $\kappa_{xx}$ maximum, determine whether $\kappa_{xy}$ arises from band-intrinsic phonon chirality (for example involving the soft polar mode and structural domains) or from extrinsic skew scattering, by establishing how $\kappa_{xy}$ scales with $\kappa_{xx}$ and with controlled defect density (oxygen vacancies, isotope substitution).
Settled by · changed · core
Revision 1: $\kappa_{xy}$ measured on crystals with independently quantified defect density, combined with first-principles phonon Berry curvature for SrTiO3.
Revision 2: $\kappa_{xy}$ measured on crystals with independently quantified defect density, combined with first-principles phonon Berry curvature for $\mathrm{SrTiO_3}$.
Kind
well-posed
Answer type
identification
References
(empty)
Literature status
open
Status note · changed
Revision 1: In SrTiO3 disorder and strain suppress $\kappa_{xy}$ and annealing partly restores it without changing $\kappa_{xx}$ (Xiang et al., npj Quantum Materials 11, 40, 2026, arXiv 2511.08932); the authors read this as an intrinsic lattice effect sensitive to imperfections, not yet tied to a microscopic mechanism.
Revision 2: In $\mathrm{SrTiO_3}$ disorder and strain suppress $\kappa_{xy}$ and annealing partly restores it without changing $\kappa_{xx}$ (Xiang et al., npj Quantum Materials 11, 40, 2026, arXiv 2511.08932); the authors read this as an intrinsic lattice effect sensitive to imperfections, not yet tied to a microscopic mechanism.
Posed since
(empty)

Decisions