Journal Article

IMPULSE-2022-00302

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Frustrated magnetic interactions in FeSe

Gu, Y. (First author) ; Wang, Q. ; Wo, H. ; He, Z. ; Walker, H. C. ; Park, J. T.MLZ* ; Enderle, M. ; Christianson, A. D. ; Wang, W. ; Zhao, J. (Corresponding author)

2022
Inst. Woodbury, NY

Please use a persistent id in citations: doi:10.1103/PhysRevB.106.L060504

Abstract: The structurally simplest high-temperature superconductor FeSe exhibits an intriguing superconductingnematic paramagnetic phase with unusual spin excitation spectra that are different from typical spin waves;thus, determining its effective magnetic exchange interactions is challenging. Here we report neutron scatteringmeasurements of spin fluctuations of FeSe in the tetragonal paramagnetic phase. We show that the equal-timemagnetic structure factor, S(Q), can be effectively modeled using the self-consistent Gaussian approximationcalculation with highly frustrated nearest-neighbor (J1) and next-nearest-neighbor (J2) exchange couplings, andvery weak further neighbor exchange interaction. Our results elucidate the frustrated magnetism in FeSe, whichprovides a natural explanation for the highly tunable superconductivity and nematicity in FeSe and relatedmaterials.

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

Note: ISSN 2469-9969 not unique: **2 hits**.

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Contributing Institute(s):

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

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2022

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

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