Tunable Metallicity at La5/8Ca3/8MnO3(001)Surface by Oxygen Overlayer
Journal Article
·
· Physical Review Letters
- ORNL
We study the surface structure of La5/8Ca3/8MnO3(001) using in-situ scanning tunnelingmicroscopy (STM). Atomically resolved STM images reveal that a ( 2 " 2)R45oreconstructed surface and a (1 1) surface can be converted back and forth through adsorptionand desorption of oxygen at the surface. Electrical properties of the surfaces are investigated byscanning tunneling spectroscopy (STS). I-V curves clearly show that the presence of an oxygen overlayer renders the surface insulating while the (1 1) surface without the oxygen overlayer is metallic.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 989115
- Journal Information:
- Physical Review Letters, Vol. 102, Issue 6; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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