تقرير
Ion-selective scattering studied by the variable-energy electron irradiation of Ba$_{0.2}$K$_{0.8}$Fe$_2$As$_2$ superconductor
العنوان: | Ion-selective scattering studied by the variable-energy electron irradiation of Ba$_{0.2}$K$_{0.8}$Fe$_2$As$_2$ superconductor |
---|---|
المؤلفون: | Cho, Kyuil, Konczykowski, M., Tanatar, M. A., Mazin, I. I., Liu, Yong, Lograsso, T. A., Prozorov, R. |
المصدر: | Materials 16(13), 4520 (2023) |
سنة النشر: | 2023 |
المجموعة: | Condensed Matter |
مصطلحات موضوعية: | Condensed Matter - Superconductivity |
الوصف: | Low-temperature variable-energy electron irradiation was used to induce non-magnetic disorder in a single crystal of hole-doped iron-based superconductor, Ba$_{1-x}$K$_x$Fe$_2$As$_2$, $x=$0.80. To avoid systematic errors, the beam energy was adjusted non-consequently for five values between 1.0 and 2.5 MeV, whence sample resistance was measured in-situ at 22 K. For all energies, the resistivity raises linearly with the irradiation fluence suggesting the creation of uncorrelated dilute point-like disorder (confirmed by simulations). The rate of the resistivity increase peaks at energies below 1.5 MeV. Comparison with calculated partial cross-sections points to the predominant creation of defects in the iron sublattice. Simultaneously, superconducting $T_c$, measured separately between the irradiation runs, is monotonically suppressed as expected since it depends on the total scattering rate, hence total cross-section, which is a monotonically increasing function of energy. Our work confirms experimentally an often-made assumption of the dominant role of the iron sub-lattice in iron-based superconductors. |
نوع الوثيقة: | Working Paper |
DOI: | 10.3390/ma16134520 |
URL الوصول: | http://arxiv.org/abs/2305.13217 |
رقم الأكسشن: | edsarx.2305.13217 |
قاعدة البيانات: | arXiv |
كن أول من يترك تعليقا!