| Autor: |
Sanghoon Kim, Byeong-Gwan Cho, Sangmo Kim, Tae Kwon Lee, Philip Ryan, Jin San Choi, Chung Wung Bark, Jiwoong Kim, Si-Young Choi, Mihyun Yang, Sanghan Lee, Gi-Yeop Kim, Jong-Woo Kim, Jongmin Lee, T. Y. Koo, Dong Ryeol Lee, Kyuwook Ihm, Yongseong Choi, Sungkyun Park, Seyeop Jeong, Tae Heon Kim, Seo Hyoung Chang, Jong Hoon Jung |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
ACS applied materialsinterfaces. 13(45) |
| ISSN: |
1944-8252 |
| Popis: |
Understanding metal-to-insulator phase transitions in solids has been a keystone not only for discovering novel physical phenomena in condensed matter physics but also for achieving scientific breakthroughs in materials science. In this work, we demonstrate that the transport properties (i.e., resistivity and transition temperature) in the metal-to-insulator transitions of perovskite nickelates are tunable via the epitaxial heterojunctions of LaNiO3 and NdNiO3 thin films. A mismatch in the oxygen coordination environment and interfacial octahedral coupling at the oxide heterointerface allows us to realize an exotic phase that is unattainable in the parent compound. With oxygen vacancy formation for strain accommodation, the topmost LaNiO3 layer in LaNiO3/NdNiO3 bilayer thin films is structurally engineered and it electrically undergoes a metal-to-insulator transition that does not appear in metallic LaNiO3. Modification of the NdNiO3 template layer thickness provides an additional knob for tailoring the tilting angles of corner-connected NiO6 octahedra and the linked transport characteristics further. Our approaches can be harnessed to tune physical properties in complex oxides and to realize exotic physical phenomena through oxide thin-film heterostructuring. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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