期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 140, 期 22, 页码 6754-6757出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.8b03009
关键词
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资金
- MEXT, Japan [12024046]
- JST-CREST
- JSPS-KAKENHI [26105002, JP17J05331, 18H03872]
- Mitsubishi Foundation
- Center for Spintronics Research Network (CSRN), Tohoku University
We report a superconducting transition in a LaO epitaxial thin film with the superconducting transition onset temperature (T-c) at around 5 K. This T-c is higher than those of other lanthanum monochalcogenides and opposite to their chemical trend: T-c = 0.84, 1.02, and 1.48 K for LaX (X = S, Se, Te), respectively. The carrier control resulted in a dome-shaped Tc as a function of electron carrier density. In addition, the T-c was significantly sensitive to epitaxial strain in spite of the highly symmetric crystal structure. This rock-salt superconducting LaO could be a building block to design novel superlattice superconductors.
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