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- W4383371188 abstract "Strontium titanate (STO), apart from being a ubiquitous substrate for complex-oxide heterostructures, possesses a multitude of strongly coupled electronic and mechanical properties. Surface acoustic wave (SAW) generation and detection offers insight into electromechanical couplings that are sensitive to quantum paraelectricity and other structural phase transitions. Propagating SAWs can interact with STO-based electronic nanostructures, in particular ${mathrm{LaAlO}}_{3}/{mathrm{SrTiO}}_{3}$ (LAO/STO). Here, we report the generation and detection of SAW within LAO/STO heterointerfaces at cryogenic temperatures ($Tensuremath{ge}2$ K) using superconducting interdigitated transducers. The temperature dependence shows an increase in the SAW quality factor that saturates at $Tensuremath{approx}8$ K. The effect of backgate tuning on the SAW resonance frequency shows the possible acoustic coupling with the ferroelastic domain wall evolution. This method of generating SAWs provides a pathway towards the dynamic tuning of ferroelastic domain structures, which are expected to influence the electronic properties of complex-oxide nanostructures. Devices that incorporate SAWs may in turn help to elucidate the role of ferroelastic domain structures in mediating electronic behavior." @default.
- W4383371188 created "2023-07-07" @default.
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- W4383371188 date "2023-07-06" @default.
- W4383371188 modified "2023-10-12" @default.
- W4383371188 title "Surface acoustic wave generation and detection in the quantum paraelectric regime of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mi>SrTiO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math> -based heterostructures" @default.
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- W4383371188 doi "https://doi.org/10.1103/physrevb.108.l041402" @default.
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