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Новый магнитный сверхпроводник стехиометрического состава EuRbFe4As4
Успехи физических наук. 2022. Т. 192. № 7. С. 790–798.
Ким Т. К., Перваков К. С., Власенко В. А., Садаков А. В., Усольцев А. С., Евтушинский Д. В., Юн С., В. М. Пудалов
In the new stoichiometric high-temperature iron-based superconductor RbEuFe4As4, superconductivity coexists
with a peculiar long-range magnetic order of the Eu 4f states; their coexistence is an enigma and a challenge for both experiment and theory. Using angle-resolved photoemission spectroscopy (ARPES), resonant photoemission spectroscopy (ResPES), Andreev reflection spectroscopy, scanning tunnel-ing spectroscpy, and DFT band structure calculations, we have made significant progress in solving this puzzle. Our results unambiguously indicate a separation between the electronic states of Fe (superconductivity) and Eu (magnetism) and demonstrate the existence of superconducting and long-range magnetic orders almost independently of each other.
Keywords: высокотемпературный сверхпроводникhigh temperature superconductorsantiferromagnetsАнтиферромагнетики
Publication based on the results of:
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