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arXiv · 1208.2687

Nonlocal Piezoresponse of LaAlO3/SrTiO3 Heterostructures

Mengchen Huang·Feng Bi·Chung-Wung Bark·Sangwoo Ryu·Kwang-Hwan Cho·Chang-Beom Eom·Jeremy Levy
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Abstract

The hysteretic piezoelectric response in LaAlO3/SrTiO3 heterostructures can provide important insights into the mechanism for interfacial conductance and its metastability under various conditions. We have performed a variety of nonlocal piezoelectric force microscopy experiments on 3 unit cell LaAlO3/SrTiO3 heterostructures. A hysteretic piezoresponse is observed under various environmental and driving conditions. The hysteresis is suppressed when either the sample is placed in vacuum or the interface is electrically grounded. We present a simple physical model which can account for the observed phenomena.

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Mengchen Huang, Feng Bi, Chung-Wung Bark, Sangwoo Ryu, Kwang-Hwan Cho, Chang-Beom Eom, Jeremy Levy. 2012-08-13. Nonlocal Piezoresponse of LaAlO3/SrTiO3 Heterostructures. https://arxiv.org/abs/1208.2687

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