title: Co-Rich ZnCoO Nanoparticles Embedded in Wurtzite Zn1-xCoxO Thin Films: Possible Origin of Superconductivity.
abstract: Co-rich ZnCoO nanoparticles embedded in wurtzite Zn0.7Co0.3O thin films are grown by pulsed laser deposition on a Si substrate. Local superconductivity with an onset Tc at 5.9 K is demonstrated in the hybrid system. The unexpected superconductivity probably results from Co3+ in the Co-rich ZnCoO nanoparticles or from the interface between the Co-rich nanoparticles and the Zn0.7Co0.3O matrix.
authors.affiliation: Shenzhen Key Laboratory of Laser Engineering, College of Optoelectronic Engineering, Shenzhen University , Shenzhen, 518060, People's Republic of China.|Solid State Physics and Magnetism Section, KU Leuven , Celestijnenlaan 200 D, BE-3001 Leuven, Belgium.|State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, People's Republic of China.
authors.forename: Yu-Jia
authors.initials: YJ
authors.lastname: Zeng
authors.affiliation: Electron Microscopy for Materials Science (EMAT), University of Antwerp , Groenenborgerlaan 171, BE-2020 Antwerp, Belgium.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Gauquelin
authors.affiliation: Solid State Physics and Magnetism Section, KU Leuven , Celestijnenlaan 200 D, BE-3001 Leuven, Belgium.
authors.forename: Dan-Ying
authors.initials: DY
authors.lastname: Li
authors.affiliation: Shenzhen Key Laboratory of Laser Engineering, College of Optoelectronic Engineering, Shenzhen University , Shenzhen, 518060, People's Republic of China.
authors.forename: Shuang-Chen
authors.initials: SC
authors.lastname: Ruan
authors.affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, People's Republic of China.
authors.forename: Hai-Ping
authors.initials: HP
authors.lastname: He
authors.affiliation: Electron Microscopy for Materials Science (EMAT), University of Antwerp , Groenenborgerlaan 171, BE-2020 Antwerp, Belgium.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Egoavil
authors.affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, People's Republic of China.
authors.forename: Zhi-Zhen
authors.initials: ZZ
authors.lastname: Ye
authors.affiliation: Electron Microscopy for Materials Science (EMAT), University of Antwerp , Groenenborgerlaan 171, BE-2020 Antwerp, Belgium.
authors.forename: Johan
authors.initials: J
authors.lastname: Verbeeck
authors.affiliation: Electron Microscopy for Materials Science (EMAT), University of Antwerp , Groenenborgerlaan 171, BE-2020 Antwerp, Belgium.
authors.forename: Joke
authors.initials: J
authors.lastname: Hadermann
authors.affiliation: Solid State Physics and Magnetism Section, KU Leuven , Celestijnenlaan 200 D, BE-3001 Leuven, Belgium.
authors.forename: Margriet J
authors.initials: MJ
authors.lastname: Van Bael
authors.affiliation: Solid State Physics and Magnetism Section, KU Leuven , Celestijnenlaan 200 D, BE-3001 Leuven, Belgium.
authors.forename: Chris
authors.initials: C
authors.lastname: Van Haesendonck
keywords: ZnCoO; ZnO; nanoparticles; superconductivity; wurtzite