Epitaxial growth and superconductivity of optimally doped Sr1-xEuxCuO2 cuprate films

Yan, Hang1; Deng, Ze-Xian1; Fan, Jia-Qi1; Yu, Xue-Qing1; Hu, Xiao-Peng1; Song, Can-Li1,2; Ma, Xu-Cun1,2; Xue, Qi-Kun1,2,3,4

2023-07-06

10.1103/PhysRevMaterials.7.074802

PHYSICAL REVIEW MATERIALS   影响因子和分区

2475-9953

Superconducting infinite-layer Sr1-xEuxCuO2 films at optimal doping (x similar to 0.15) have been epitaxially grown on SrTiO3(001) substrates with oxide molecular beam epitaxy. By combining x-ray diffraction and transport measurements, we have established a narrow window of growth conditions [i.e., ozone pressure, substrate temperature, (Sr + Eu)/Cu flux ratio, and postannealing] in which the superconducting infinite-layer structure can be readily achieved while eliminating any unwanted competing phases. A smaller out-of-plane lattice constant (c < 3.42 angstrom) is found to be crucial to prompt superconductivity in the Sr1-xEuxCuO2 films. Thickness-dependent electrical resistivity measurements reveal superconductivity even when the film thickness is thinned down to 5 nm. Furthermore, the superconducting state of the epitaxial infinite-layer films remains remarkably stable against air exposure, providing an ideal platform to explore the high-temperature superconductivity and unusual properties in cuprates.

SCI ; EI

英语

其他

National Key Ramp;D Program of China[2022YFA1403100] ; National Natural Science Foundation of China[12134008]

Materials Science

Materials Science, Multidisciplinary

WOS:001051420200002

AMER PHYSICAL SOC

20232914412083

Oxide films ; Semiconductor doping ; Strontium titanates ; Substrates ; Superconducting films

Superconducting Materials:708.3 ; Semiconducting Materials:712.1 ; Chemical Products Generally:804 ; Atomic and Molecular Physics:931.3 ; Crystal Growth:933.1.2

Web of Science

1.Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
2.Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China
3.Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China
4.Southern Univ Sci & Technol, Shenzhen 518055, Peoples R China

Yan, Hang,Deng, Ze-Xian,Fan, Jia-Qi,et al. Epitaxial growth and superconductivity of optimally doped Sr1-xEuxCuO2 cuprate films[J]. PHYSICAL REVIEW MATERIALS,2023,7(7).

Yan, Hang.,Deng, Ze-Xian.,Fan, Jia-Qi.,Yu, Xue-Qing.,Hu, Xiao-Peng.,...&Xue, Qi-Kun.(2023).Epitaxial growth and superconductivity of optimally doped Sr1-xEuxCuO2 cuprate films.PHYSICAL REVIEW MATERIALS,7(7).

Yan, Hang,et al."Epitaxial growth and superconductivity of optimally doped Sr1-xEuxCuO2 cuprate films".PHYSICAL REVIEW MATERIALS 7.7(2023).