Phase separation in iron chalcogenide superconductor Rb₀.₈₊xFe₁.₆₊ySe₂ as seen by Raman light scattering and band structure calculations

• Published in: Физика низких температур
• Date: 2016
• Main Authors: Pashkevich, Yu., Gnezdilov, V., Lemmens, P., Shevtsova, T., Gusev, A., Lamonova, K., Wulferding, D., Gnatchenko, S., Pomjakushina, E., Conder, K.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2016
• Subjects: К 100-летию со дня рождения К.Б. Толпыго
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/129161
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Phase separation in iron chalcogenide superconductor Rb₀.₈₊xFe₁.₆₊ySe₂ as seen by Raman light scattering and band structure calculations / Yu. Pashkevich, V. Gnezdilov, P. Lemmens, T. Shevtsova, A. Gusev, K. Lamonova, D. Wulferding, S. Gnatchenko, E. Pomjakushina, K. Conder // Физика низких температур. — 2003. — Т. 42, № 6. — С. 628-643. — Бібліогр.: 72 назв. — англ.

We report Raman light scattering in the phase separated superconducting single crystal Rb₀.₇₇Fe₁.₆₁Se₂ with Tc = 32 K over a wide temperature region 3–500 K. The observed phonon lines from the majority vacancy ordered Rb₂Fe₄Se₅ (245) antiferromagnetic phase with TN = 525 K demonstrate modest anomali...