Journal Article

IMPULSE-2021-00292

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Polarized neutron scattering studies of magnetic excitations in iron-selenide superconductor Li$_{0.8}$Fe$_{0.2}$ODFeSe (T$_{c}$ = 41 K)

Hu, D. ; Feng, Y. ; Park, J.MLZ* ; Wo, H. ; Wang, Q. ; Bourdarot, F. ; Ivanov, A. ; Zhao, J. (Corresponding author)

2021
IOP Publ. Bristol

Please use a persistent id in citations: doi:10.1088/1361-648X/ac1d16

Abstract: We report polarized neutron scattering measurements of the low energy spin fluctuations of the iron-selenide superconductor Li0.8Fe0.2ODFeSe below and above its superconducting transition temperature Tc = 41 K. Our experiments confirmed that the resonance mode near 21 meV is magnetic. Moreover, the spin excitations are essentially isotropic in spin space at 5 ⩽ E ⩽ 29 meV in the superconducting and normal states. Our results suggest that the resonance mode in iron-based superconductors becomes isotropic when the influence of spin–orbit coupling and magnetic/nematic order is minimized, similar to those observed in cuprate superconductors.

Keyword(s): Magnetic Materials (1st) ; Condensed Matter Physics (2nd) ; Magnetism (2nd)

---

Contributing Institute(s):

1. PUMA (PUMA)
2. QUANTUM (QUANTUM)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2021

---

Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---