Controllable nanostructures on La0.7Sr0.3MnO3 thin film surfaces formed by scanning tunneling microscopy |
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| Authors: | Yun Liu Jia Zhang |
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| Affiliation: | a Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
b School of Mechanical Engineering, University of South China, Hengyang 421001, China |
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| Abstract: | Nanoscale structuring on La0.7Sr0.3MnO3 (LSMO) thin film surfaces has been performed by scanning tunneling microscopy (STM) under ambient conditions. From line etching experiments we found that the line-depth increases in a stepwise fashion with increasing bias voltage. It also increases with decreasing scan speed and increasing scan repetition. We observed that the line-depth is an integral multiple of the LSMO out-of-plane lattice constant about 0.4 nm. Lateral structure with minimum feature size of 1 nm is possible to obtain. In addition, a four-level inverse-pyramid structure has been created on LSMO thin film surfaces. Our work shows the feasibility of using STM to fabricate controllable and complex nanostructures in LSMO thin film. |
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| Keywords: | Scanning tunneling microscopy La0.7Sr0.3MnO3 Nanostructures |
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