تقرير
Impact of atomic defects in the electronic states of FeSe$_{1-x}$S$_{x}$ superconducting crystals
| العنوان: | Impact of atomic defects in the electronic states of FeSe$_{1-x}$S$_{x}$ superconducting crystals |
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| المؤلفون: | Sánchez, Jazmín Aragón, Amigó, María Lourdes, Belussi, Cristian Horacio, Crivillero, María Victoria Ale, Suárez, Sergio, Guimpel, Julio, Nieva, Gladys, Gayone, Julio Esteban, Fasano, Yanina |
| المصدر: | J. Phys. Mater. 5 044008 (2022) |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | The electronic properties of Fe-based superconductors are drastically affected by deformations on their crystal structure introduced by doping and pressure. Here we study single crystals of FeSe$_{1-x}$S$_{x}$ and reveal that local crystal deformations such as atomic-scale defects impact the spectral shape of the electronic core level states of the material. By means of scanning tunnelling microscopy (STM) we image S-doping induced defects as well as diluted dumbbell defects associated with Fe vacancies. We have access to the electronic structure of the samples by means of X-ray photoemission spectroscopy (XPS) and show that the spectral shape of the Se core levels can only be adequately described by considering a principal plus a minor component of the electronic states. We find this result for both pure and S-doped samples, irrespective that in the latter case the material presents extra crystal defects associated to doping with S atoms. We argue that the second component in our XPS spectra is associated with the ubiquitous dumbbell defects in FeSe that are known to entail a significant modification of the electronic clouds of surrounding atoms. Comment: 12 pages, 7 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/2515-7639/ac9dc1 |
| الوصول الحر: | http://arxiv.org/abs/2211.05305Test |
| رقم الانضمام: | edsarx.2211.05305 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/2515-7639/ac9dc1 |
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