تقرير
Molecular beam epitaxy preparation and in situ characterization of FeTe thin films
| العنوان: | Molecular beam epitaxy preparation and in situ characterization of FeTe thin films |
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| المؤلفون: | Pereira, V. M., Wu, C. N., Liu, C. E., Liao, S. -S., Chang, C. F., Kuo, C. -Y., Koz, C., Schwarz, U., Lin, H. -J., Tjeng, C. T. Chen. L. H., Altendorf, S. G. |
| المصدر: | Phys. Rev. Materials 4, 023405, 2020 |
| سنة النشر: | 2020 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | We have synthesized Fe$_{1+y}$Te thin films by means of molecular beam epitaxy (MBE) under Te-limited growth conditions. We found that epitaxial layer-by-layer growth is possible for a wide range of excess Fe values, wider than expected from what is known on the bulk material. Using x-ray magnetic circular dichroism spectroscopy at the Fe L$_{2,3}$ and Te M$_{4,5}$ edges, we observed that films with high excess Fe contain ferromagnetic clusters while films with lower excess Fe remain nonmagnetic. Moreover, x-ray absorption spectroscopy showed that it is possible to obtain films with very similar electronic structure as that of a high quality bulk single crystal Fe$_{1.14}$Te. Our results suggest that MBE with Te-limited growth may provide an opportunity to synthesize FeTe films with smaller amounts of excess Fe as to come closer to a possible superconducting phase. Comment: 6 pages, 6 figures accepted for publication in Physical Review Materials |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevMaterials.4.023405 |
| URL الوصول: | http://arxiv.org/abs/2002.09507 |
| رقم الأكسشن: | edsarx.2002.09507 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevMaterials.4.023405 |
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