1. Tuning superconductivity of Bi2Sr2CaCu2O8+x by fluoride ion intercalation with LaF3 gate dielectric.
- Author
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Wang, Heng, Cao, Zongzheng, Zhu, Yuying, Liao, Menghan, Gu, Genda, Xue, Qi-Kun, and Zhang, Ding
- Subjects
SUPERCONDUCTIVITY ,SUPERCONDUCTING transitions ,DIELECTRICS ,FLUORIDES ,IONS - Abstract
We demonstrate fluorine intercalation into Bi
2 Sr2 CaCu2 O8+x (BSCCO) flakes, as thick as 100 nm, by back-gating a single crystalline LaF3 substrate. Element-sensitive analysis not only confirms the presence of fluorine in BSCCO after gating but also reveals lateral diffusion of fluorine in BSCCO. Transport measurements further demonstrate the hole-doping effect of fluoride ions in BSCCO through effective modulation of the superconducting transitions. Our work introduces a distinct type of ions (F− ) that can be intercalated into materials via solid state back-gating. It broadens the toolbox of ion back-gating and is useful for addressing exotic phenomena in the heavily hole doped regime. [ABSTRACT FROM AUTHOR]- Published
- 2022
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