Competition between orthorhombic and re-entrant tetragonal phases in underdoped Ba1−xKxFe2As2 probed by the response to controlled disorder
| العنوان: | Competition between orthorhombic and re-entrant tetragonal phases in underdoped Ba1−xKxFe2As2 probed by the response to controlled disorder |
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| المؤلفون: | Yong Liu, S. Teknowijoyo, O. Cavani, Erik Timmons, Kristin Willa, Ulrich Welp, Kyuil Cho, Marcin Konczykowski, Thomas A. Lograsso, Ruslan Prozorov, Makariy A. Tanatar |
| المصدر: | Physical Review B. 99 |
| بيانات النشر: | American Physical Society (APS), 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Superconductivity, Physics, Condensed matter physics, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Omega, Tetragonal crystal system, Electrical resistivity and conductivity, Phase (matter), Scattering rate, 0103 physical sciences, Antiferromagnetism, Orthorhombic crystal system, 010306 general physics, 0210 nano-technology |
| الوصف: | Low-temperature (22~K) irradiation with 2.5~MeV electrons was used to study the competition between stripe ${\rm C_2}$ and tetragonal ${\rm C_4}$ antiferromagnetic phases which exist in a narrow doping range around $x=$0.25 in hole-doped Ba$_{1-x}$K$_x$Fe$_2$As$_2$. In nearby compositions outside of this range, at $x=$0.22 and $x=$0.19, the temperatures of both the concomitant orthorhombic/stripe antiferromagnetic transition $T_{\rm C2}$ and the superconducting transition $T_{\rm c}$ are monotonically suppressed by added disorder at similar rates of about 0.1~K/$\mu \Omega$cm, as revealed through using resistivity variation as an intrinsic measure of scattering rate. In a stark contrast, a rapid suppression of the ${\rm C_4}$ phase at the rate of 0.24 K/$\mu \Omega \cdot$cm is found at $x=$0.25. Moreover, this suppression of the ${\rm C_4}$ phase is accompanied by unusual disorder-induced stabilization of the ${\rm C_2}$ phase, determined by resistivity and specific heat measurements. The rate of the ${\rm C_4}$ phase suppression is notably higher than the suppression rate of the spin-vortex phase in the Ni-doped CaKFe$_4$As$_4$ (0.16 K/$\mu \Omega$cm). |
| تدمد: | 2469-9969 2469-9950 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::304792d6398327a5fcc21a4a95eacc47 https://doi.org/10.1103/physrevb.99.054518 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........304792d6398327a5fcc21a4a95eacc47 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24699969 24699950 |
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