scholarly journals High-energy spin excitations inBaFe2As2observed by inelastic neutron scattering

2008 ◽  
Vol 78 (22) ◽  
Author(s):  
R. A. Ewings ◽  
T. G. Perring ◽  
R. I. Bewley ◽  
T. Guidi ◽  
M. J. Pitcher ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
High Energy ◽  
Inelastic Neutron ◽  
Spin Excitations

scholarly journals Low-energy spin excitations in (Li0.8Fe0.2)ODFeSe superconductor studied with inelastic neutron scattering

2017 ◽  
Vol 95 (10) ◽  
Author(s):  
Mingwei Ma ◽  
Lichen Wang ◽  
Philippe Bourges ◽  
Yvan Sidis ◽  
Sergey Danilkin ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Low Energy ◽  
Spin Excitations

scholarly journals Probing high-energy electronic excitations in NiO using inelastic neutron scattering

2011 ◽  
Vol 84 (8) ◽  
Author(s):  
Young-June Kim ◽  
A. P. Sorini ◽  
C. Stock ◽  
T. G. Perring ◽  
J. van den Brink ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
High Energy ◽  
Inelastic Neutron ◽  
Electronic Excitations

scholarly journals Spin excitations in metallic kagome lattice FeSn and CoSn

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Yaofeng Xie ◽  
Lebing Chen ◽  
Tong Chen ◽  
Qi Wang ◽  
Qiangwei Yin ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Spin Waves ◽  
Inelastic Neutron ◽  
Spin Excitation ◽  
Destructive Interference ◽  
Kagome Lattice ◽  
Kagomé Lattice ◽  
Flat Bands ◽  
Spin Excitations

AbstractIn two-dimensional (2D) metallic kagome lattice materials, destructive interference of electronic hopping pathways around the kagome bracket can produce nearly localized electrons, and thus electronic bands that are flat in momentum space. When ferromagnetic order breaks the degeneracy of the electronic bands and splits them into the spin-up majority and spin-down minority electronic bands, quasiparticle excitations between the spin-up and spin-down flat bands should form a narrow localized spin-excitation Stoner continuum coexisting with well-defined spin waves in the long wavelengths. Here we report inelastic neutron scattering studies of spin excitations in 2D metallic kagome lattice antiferromagnetic FeSn and paramagnetic CoSn, where angle resolved photoemission spectroscopy experiments found spin-polarized and nonpolarized flat bands, respectively, below the Fermi level. Our measurements on FeSn and CoSn reveal well-defined spin waves extending above 140 meV and correlated paramagnetic scattering around Γ point below 90 meV, respectively. In addition, we observed non-dispersive excitations at ~170 meV and ~360 meV arising mostly from hydrocarbon scattering of the CYTOP-M used to glue the samples to aluminum holder. Therefore, our results established the evolution of spin excitations in FeSn and CoSn, and identified anomalous flat modes overlooked by the neutron scattering community for many years.

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