Impact of thickness on microscopic and macroscopic properties of Fe-Te-Se superconductor thin films
Zhang N(张念); Wang JO(王嘉鸥); Lei T(雷涛); Liu C(刘晨); Zhang SH(张双红); Qian HJ(钱海杰); Wu R(吴蕊); Zhou H(周华); Kui RX(奎热西); Zhang, N; Wang, JO; Lei, T; Liu, C; Zhang, SH; Qian, HJ; Wu, R; Zhou, H; Wang, HQ; Zheng, JC; Guo, HZ; Yan, L; Ibrahim, K
刊名AIP ADVANCES
2015
卷号5期号:4页码:47149
学科分类Science & Technology - Other Topics; Materials Science; Physics
DOI10.1063/1.4919695
通讯作者奎热西
文章类型Article
英文摘要A series of iron based Fe-Te-Se superconductor thin films depositing on 0.7wt% Nb-doped SrTiO3 at substrate temperatures in the 250 degrees C-450 degrees C range by pulsed laser ablation of a constituents well defined precursor FeTe0.55Se0.55 target sample. We study the possible growth mechanism and its influence on the superconductor properties. Experimental results indicate the superconductive and non-superconductive properties are modulated only by the thickness of the thin films through the temperature range. The films appear as superconductor whenever the thickness is above a critical value similar to 30nm and comes to be non-superconductor below this value. Relative ratios of Fe to (Te+Se) in the films retained Fe/(Te+Se)<1 for superconductor and Fe/(Te+Se)>1 for non-superconductor no matter what the film growth temperature was. The effect of film growth temperature takes only the role of modulating the ratio of Te/Se and improving crystallinity of the systems. According to the experimental results we propose a sandglass film growth mechanism in which the interfacial effect evokes to form a Fe rich area at the interface and Se or Te starts off a consecutive filling up process of chalcogenide elements defect sides, the process is significant before the film thickness reaches at similar to 30nm. (C) 2015 Author(s).
类目[WOS]Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
收录类别SCI ; EI ; CA
WOS记录号WOS:000353827700082
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228553
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
中国科学院高能物理研究所_多学科研究中心
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Zhang N,Wang JO,Lei T,et al. Impact of thickness on microscopic and macroscopic properties of Fe-Te-Se superconductor thin films[J]. AIP ADVANCES,2015,5(4):47149.
APA 张念.,王嘉鸥.,雷涛.,刘晨.,张双红.,...&Ibrahim, K.(2015).Impact of thickness on microscopic and macroscopic properties of Fe-Te-Se superconductor thin films.AIP ADVANCES,5(4),47149.
MLA 张念,et al."Impact of thickness on microscopic and macroscopic properties of Fe-Te-Se superconductor thin films".AIP ADVANCES 5.4(2015):47149.
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