Co-deposition growth and superconductivity of La2-xSrxCu O4 films by reactive molecular beam epitaxy

Wang，Yang1; Wang，Rui Feng1; Zhang，Qinghua2; Liao，Menghan1; Gu，Lin2; Zhang，Ding1,3,4; Song，Can Li1,3; Ma，Xu Cun1,3; Xue，Qi Kun1,3,4,5

2021-05-24

10.1103/PhysRevB.103.184514

Physical Review B   影响因子和分区

2469-9950

2469-9969

Reactive molecular beam epitaxy has been employed to prepare La2-xSrxCuO4 cuprate films via a Co-deposition method. Precise control of flux ratios among the solid sources leads us to establish a very narrow growth window for the cation stoichiometry. The hole doping by divalent Sr2+ cation is found to occur in a substitution-limited manner, accompanied by partial oxidation of Sr flux into peroxide SrO2 on the top surface. Through interface engineering, we explore the impact of substrate strain on the crystal parameters and superconductivity of La2-xSrxCuO4 thin films. The present study provides a time-saving, effective approach to preparing high-quality cuprate films, and further understanding the effect of surface/interface microstructures on cuprate superconductivity.

SCI ; EI

英语

NI期刊

其他

WOS:000655897200003

20212310457258

Copper compounds ; Molecular beam epitaxy ; Molecular beams ; Positive ions ; Strontium compounds ; Ternary alloys ; Thin films

Semiconducting Materials:712.1 ; Atomic and Molecular Physics:931.3

PHYSICS

2-s2.0-85107125053

Scopus

1.State Key Laboratory of Low-Dimensional Quantum Physics,Department of Physics,Tsinghua University,Beijing,100084,China
2.Institute of Physics,Chinese Academy of Sciences,Beijing,100190,China
3.Frontier Science Center for Quantum Information,Beijing,100084,China
4.Beijing Academy of Quantum Information Sciences,Beijing,100193,China
5.Southern University of Science and Technology,Shenzhen,518055,China

Wang，Yang,Wang，Rui Feng,Zhang，Qinghua,et al. Co-deposition growth and superconductivity of La2-xSrxCu O4 films by reactive molecular beam epitaxy[J]. Physical Review B,2021,103(18).

Wang，Yang.,Wang，Rui Feng.,Zhang，Qinghua.,Liao，Menghan.,Gu，Lin.,...&Xue，Qi Kun.(2021).Co-deposition growth and superconductivity of La2-xSrxCu O4 films by reactive molecular beam epitaxy.Physical Review B,103(18).

Wang，Yang,et al."Co-deposition growth and superconductivity of La2-xSrxCu O4 films by reactive molecular beam epitaxy".Physical Review B 103.18(2021).