Electromechanical Response from LaAlO3/SrTiO3 Heterostructures
Source abstract
Abstract
LaAlO3 ultrathin films, 10 unit cells in thickness, have been deposited epitaxially on TiO2-terminated (001) SrTiO3 substrates with various O2 pressures. Electromechanical response from the LaAlO3/SrTiO3 heterostructures is studied using combined piezoresponse force microscopy, electrostatic force microscopy, and scanning Kelvin probe microscopy. Oxygen vacancies are found to be responsible for the observed piezoelectric response but only for samples deposited with an oxygen pressure lower than 10(-5) mbar. However, ambient humidity is demonstrated to have a significant effect on the electromechanical response. The observations are discussed in terms of modulations on the intrinsic electrostriction in LAO/STO by an electric field induced by nonuniform distribution of either oxygen vacancies in the bulk or ionic adsorbates on the surface of LAO.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electronic and Structural Properties of Oxides · Ferroelectric and Piezoelectric Materials · Magnetic and transport properties of perovskites and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
Funding
Ministry of Education of the People's Republic of China · Ministry of Science and Technology of the People's Republic of China · Natural Science Foundation of Jiangsu Province · National Natural Science Foundation of China
References (38)
Show source-provided references
1. Ohtomo A. · Nature (London) · 2004 · 427 · 42310.1038/nature02308 ↗
2. Nakagawa N. · Nat. Mater. · 2006 · 5 · 20410.1038/nmat1569 ↗
3. Herranz G. · Phys. Rev. Lett. · 2007 · 98 · 21680310.1103/PhysRevLett.98.216803 ↗
4. Siemons W. · Phys. Rev. Lett. · 2007 · 98 · 19680210.1103/PhysRevLett.98.196802 ↗
5. Kalabukhov A. · Phys. Rev. B · 2007 · 75 · 121404 (R)10.1103/PhysRevB.75.121404 ↗
6. Siemons W. · Phys. Rev. B · 2007 · 76 · 15511110.1103/PhysRevB.76.155111 ↗
7. Chen Y. Z. · Nano Lett. · 2011 · 11 · 377410.1021/nl201821j ↗
8. Santander-Syro A. F. · Nature · 2011 · 469 · 18910.1038/nature09720 ↗
9. Meevasana W. · Nat. Mater. · 2011 · 10 · 11410.1038/nmat2943 ↗
10. Sambri A. · Appl. Phys. Lett. · 2012 · 100 · 23160510.1063/1.4727905 ↗
11. Liu Z. Q. · Phys. Rev. X · 2013 · 3 · 021010
12. Willmott P. R. · Phys. Rev. Lett. · 2007 · 99 · 15550210.1103/PhysRevLett.99.155502 ↗
13. Breckenfeld E. · Phys. Rev. Lett. · 2013 · 110 · 19680410.1103/PhysRevLett.110.196804 ↗
14. Sato H. K. · Appl. Phys. Lett. · 2013 · 102 · 25160210.1063/1.4812353 ↗
15. Reyren N. · Science · 2007 · 317 · 119610.1126/science.1146006 ↗
16. Reyren N. · Appl. Phys. Lett. · 2009 · 94 · 11250610.1063/1.3100777 ↗
17. Brinkman A. · Nat. Mater. · 2007 · 6 · 49310.1038/nmat1931 ↗
18. Ariando · Nat. Commun. · 2011 · 2 · 18810.1038/ncomms1192 ↗
19. Li L. · Nat. Phys. · 2011 · 7 · 76210.1038/nphys2080 ↗
20. Dikin D. A. · Phys. Rev. Lett. · 2011 · 107 · 05680210.1103/PhysRevLett.107.056802 ↗
21. Bert J. A. · Nat. Phys. · 2011 · 7 · 76710.1038/nphys2079 ↗
22. Michaeli K. · Phys. Rev. Lett. · 2012 · 108 · 11700310.1103/PhysRevLett.108.117003 ↗
23. Lee J.-S. · Nat. Mater. · 2013 · 12 · 70310.1038/nmat3674 ↗
24. Banerjee S. · Nat. Phys. · 2013 · 9 · 62610.1038/nphys2702 ↗
25. Narayanapillai K. · Appl. Phys. Lett. · 2013 · 105 · 16240510.1063/1.4899122 ↗
26. Park J. W. · Nat. Commun. · 2013 · 1 · 9410.1038/ncomms1096 ↗
27. Kim S.-I. · Adv. Mater. · 2013 · 25 · 461210.1002/adma.201301097 ↗
28. Cen C. · Nat. Mater. · 2008 · 7 · 29810.1038/nmat2136 ↗
29. Xie Y. W. · Adv. Mater. · 2011 · 23 · 174410.1002/adma.201004673 ↗
30. Xie Y. W. · Nat. Commun. · 2011 · 2 · 49410.1038/ncomms1501 ↗
31. Au K. · Adv. Mater. · 2012 · 24 · 259810.1002/adma.201200673 ↗
32. Bark C. W. · Nano Lett. · 2012 · 12 · 176510.1021/nl3001088 ↗
33. Huang M. · Appl. Phys. Lett. · 2014 · 104 · 16160610.1063/1.4873125 ↗
34. Xie Y. W. · Nano Lett. · 2010 · 10 · 258810.1021/nl1012695 ↗
35. Kumar A. · ACS Nano · 2012 · 6 · 384110.1021/nn204960c ↗
36. Borowiak A. S. · Appl. Phys. Lett. · 2014 · 105 · 01290610.1063/1.4889853 ↗
37. Cancellieri C. · Phys. Rev. Lett. · 2011 · 107 · 05610210.1103/PhysRevLett.107.056102 ↗
38. Bi F. · Appl. Phys. Lett. · 2010 · 97 · 17311010.1063/1.3506509 ↗