Molecular beam epitaxy preparation and in situ characterization of FeTe thin films

V. M. Pereira, C. N. Wu, C. E. Liu, S. C. Liao, C. F. Chang, C. Y. Kuo, C. Koz, U. Schwarz, H. J. Lin, C. T. Chen, L. H. Tjeng, S. G. Altendorf

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

We have synthesized Fe1+yTe 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 from studies on the bulk material. Using x-ray magnetic circular dichroism spectroscopy at the Fe L2,3 and Te M4,5 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 Fe1.14Te. 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.

原文English
文章編號023405
期刊Physical Review Materials
4
發行號2
DOIs
出版狀態Published - 28 2月 2020

指紋

深入研究「Molecular beam epitaxy preparation and in situ characterization of FeTe thin films」主題。共同形成了獨特的指紋。

引用此