Anomalous Phase Transition in Strained SrTiO$_3$ Thin Films

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dc.creatorHe, Feizhou
dc.creatorWells, B. O.
dc.creatorShapiro, S. M.
dc.creatorZimmermann, M. v.
dc.creatorClark, A.
dc.creatorXi, X. X.
dc.date2003-03-17
dc.date.accessioned2026-07-07T02:50:13Z
dc.date.available2026-07-07T02:50:13Z
dc.descriptionWe have studied the cubic to tetragonal phase transition in epitaxial SrTiO$_3$ films under various biaxial strain conditions using synchrotron X-ray diffraction. Measuring the superlattice peak associated with TiO$_6$ octahedra rotation in the low temperature tetragonal phase indicates the presence of a phase transition whose critical temperature is a strong function of strain, with T$_C$ as much as 50K above the corresponding bulk temperature. Surprisingly, the lattice constants evolve smoothly through the transition with no indication of a phase change. This signals an important change in the nature of the phase transition due to the epitaxy strain and substrate clamping effect. The internal degrees of freedom (TiO$_6$ rotations) have become uncoupled from the overall lattice shape.
dc.description4 pages, 3 figures, REVTeX 4
dc.identifierhttps://arxiv.org/abs/cond-mat/0303317
dc.identifierhttp://arxiv.org/abs/cond-mat/0303317
dc.identifierAppl. Phys. Lett. 83, 123 (2003)
dc.identifierdoi:10.1063/1.1589186
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21032
dc.subjectCondensed Matter
dc.titleAnomalous Phase Transition in Strained SrTiO$_3$ Thin Films
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