| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Mesoscale Phenomena in Functional Polycrystals and Their Nanostructures
|
| Presentation Title |
D-20: Asymmetric Tribology of Symmetric Polarization |
| Author(s) |
Seongwoo Cho, Iaroslav Gaponenko, Kumara Cordero-Edwards, Jordi Barceló-Mercader, Irene Arias, Jiwon Yeom, Loïc Musy, Céline Lichtensteiger, Gustau Catalan, Patrycja Paruch, Seungbum Hong |
| On-Site Speaker (Planned) |
Seongwoo Cho |
| Abstract Scope |
We investigated asymmetric friction and wear of up and down oriented polarization domains in ferroelectric single crystals and thin films using scanning probe microscopy. Lateral force microscopy was used to visualize the local friction coefficient and topography modification following nanoscale wear in a controlled environment. Our study indicates that ferroelectric up domains have both a higher friction coefficient and faster wear rate than the down domains. We relate these nanotribological asymmetries to the asymmetric contribution of flexoelectric polarization in the up and down domains under a tip contact force. Exploiting the wear asymmetry combined with the switchable polar nature of ferroelectrics, we developed a resist/chemical/mask-free lithography technique which can be harnessed for potential electronics applications including optical devices, transistors, sensors, and energy harvesters. |