Long-Range Nanoelectromechanical Coupling at the LaAlO$_3$/SrTiO$_3$ Interface
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866914736318185472 |
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| author | Nethwewala, Aditi Eom, Kitae Yu, Muqing Ramachandran, Ranjani Eom, Chang-Beom Irvin, Patrick Levy, Jeremy |
| author_facet | Nethwewala, Aditi Eom, Kitae Yu, Muqing Ramachandran, Ranjani Eom, Chang-Beom Irvin, Patrick Levy, Jeremy |
| contents | The LaAlO$_3$/SrTiO$_3$ interface hosts a plethora of gate-tunable electronic phases. Gating of LaAlO$_3$/SrTiO$_3$ interfaces are usually assumed to occur electrostatically. However, increasing evidence suggests that non-local interactions can influence and, in some cases, dominate the coupling between applied gate voltages and electronic properties. Here, we sketch quasi-1D ballistic electron waveguides at the LaAlO$_3$/SrTiO$_3$ interface as a probe to understand how gate tunability varies as a function of spatial separation. Gate tunability measurements reveal the scaling law to be at odds with the pure electrostatic coupling observed in traditional semiconductor systems. The non-Coulombic gating at the interface is attributed to the existence of a long-range nanoelectromechanical coupling between the gate and electron waveguide, mediated by the ferroelastic domains in SrTiO$_3$. The long-range interactions at the LaAlO$_3$/SrTiO$_3$ interface add unexpected richness and complexity to this correlated electron system. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2404_00575 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Long-Range Nanoelectromechanical Coupling at the LaAlO$_3$/SrTiO$_3$ Interface Nethwewala, Aditi Eom, Kitae Yu, Muqing Ramachandran, Ranjani Eom, Chang-Beom Irvin, Patrick Levy, Jeremy Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science The LaAlO$_3$/SrTiO$_3$ interface hosts a plethora of gate-tunable electronic phases. Gating of LaAlO$_3$/SrTiO$_3$ interfaces are usually assumed to occur electrostatically. However, increasing evidence suggests that non-local interactions can influence and, in some cases, dominate the coupling between applied gate voltages and electronic properties. Here, we sketch quasi-1D ballistic electron waveguides at the LaAlO$_3$/SrTiO$_3$ interface as a probe to understand how gate tunability varies as a function of spatial separation. Gate tunability measurements reveal the scaling law to be at odds with the pure electrostatic coupling observed in traditional semiconductor systems. The non-Coulombic gating at the interface is attributed to the existence of a long-range nanoelectromechanical coupling between the gate and electron waveguide, mediated by the ferroelastic domains in SrTiO$_3$. The long-range interactions at the LaAlO$_3$/SrTiO$_3$ interface add unexpected richness and complexity to this correlated electron system. |
| title | Long-Range Nanoelectromechanical Coupling at the LaAlO$_3$/SrTiO$_3$ Interface |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2404.00575 |