تقرير
Phase diagrams on composition-spread Fe$_y$Te$_{1-x}$Se$_x$ films
| العنوان: | Phase diagrams on composition-spread Fe$_y$Te$_{1-x}$Se$_x$ films |
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| المؤلفون: | Lin, Zefeng, Tu, Sijia, Xu, Juan, Shi, Yujun, Zhu, Beiyi, Dong, Chao, Yuan, Jie, Dong, Xiaoli, Chen, Qihong, Li, Yangmu, Jin, Kui, Zhao, Zhongxian |
| المصدر: | Sci. Bull. 67 (2022) 1443-1449 |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | Fe$_y$Te$_{1-x}$Se$_x$, an archetypical iron-based high-temperature superconductor with a simple structure but rich physical properties, has attracted lots of attention because the two end compositions, Se content $x = 0$ and 1, exhibit antiferromagnetism and nematicity, respectively, making it an ideal candidate for studying their interactions with superconductivity. However, what is clearly lacking to date is a complete phase diagram of Fe$_y$Te$_{1-x}$Se$_x$ as functions of its chemical compositions since phase separation usually occurs from $x\sim 0.6$ to 0.9 in bulk crystals. Moreover, fine control of its composition is experimentally challenging because both Te and Se are volatile elements. Here we establish a complete phase diagram of Fe$_y$Te$_{1-x}$Se$_x$, achieved by high-throughput film synthesis and characterization techniques. An advanced combinatorial synthesis process enables us to fabricate an epitaxial composition-spread Fe$_y$Te$_{1-x}$Se$_x$ film encompassing the entire Se content $x$ from 0 to 1 on a single piece of CaF$_2$ substrate. The micro-region composition analysis and X-ray diffraction show a successful continuous tuning of chemical compositions and lattice parameters, respectively. The micro-scale pattern technique allows the mapping of electrical transport properties as a function of relative Se content with an unprecedented resolution of 0.0074. Combining with the spin patterns in literature, we build a detailed phase diagram that can unify the electronic and magnetic properties of Fe$_y$Te$_{1-x}$Se$_x$. Our composition-spread Fe$_y$Te$_{1-x}$Se$_x$ films, overcoming the challenges of phase separation and precise control of chemical compositions, provide an ideal platform for studying the relationship between superconductivity and magnetism. Comment: 13 pages,5 figures and Supplementary Material 3 pages,3 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.scib.2022.06.015 |
| URL الوصول: | http://arxiv.org/abs/2208.01831 |
| رقم الأكسشن: | edsarx.2208.01831 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.scib.2022.06.015 |
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