Experimental investigation of inelastic neutron scattering structure factors of three dimensional rotators

1983 ◽  
Vol 51 (4) ◽  
pp. 319-326 ◽  
Author(s):  
A. Heidemann ◽  
I. Anderson ◽  
M. Prager ◽  
W. Press
Keyword(s):  
Experimental Investigation ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Three Dimensional ◽  
Inelastic Neutron ◽  
Structure Factors

scholarly journals High-energy magnetic excitations from heavy quasiparticles in CeCu2Si2

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Yu Song ◽  
Weiyi Wang ◽  
Chongde Cao ◽  
Zahra Yamani ◽  
Yuanji Xu ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Heavy Fermion ◽  
Inelastic Neutron Scattering ◽  
Random Phase ◽  
Three Dimensional ◽  
High Energy ◽  
Inelastic Neutron ◽  
Magnetic Fluctuations ◽  
Magnetic Excitations ◽  
Iron Based

AbstractMagnetic fluctuations is the leading candidate for pairing in cuprate, iron-based, and heavy fermion superconductors. This view is challenged by the recent discovery of nodeless superconductivity in CeCu2Si2, and calls for a detailed understanding of the corresponding magnetic fluctuations. Here, we mapped out the magnetic excitations in superconducting (S-type) CeCu2Si2 using inelastic neutron scattering, finding a strongly asymmetric dispersion for E ≲ 1.5 meV, which at higher energies evolves into broad columnar magnetic excitations that extend to E ≳ 5 meV. While low-energy magnetic excitations exhibit marked three-dimensional characteristics, the high-energy magnetic excitations in CeCu2Si2 are almost two-dimensional, reminiscent of paramagnons found in cuprate and iron-based superconductors. By comparing our experimental findings with calculations in the random-phase approximation,we find that the magnetic excitations in CeCu2Si2 arise from quasiparticles associated with its heavy electron band, which are also responsible for superconductivity. Our results provide a basis for understanding magnetism and superconductivity in CeCu2Si2, and demonstrate the utility of neutron scattering in probing band renormalization in heavy fermion metals.

Anomalous vibrational modes in acetanilide as studied by inelastic neutron scattering

1992 ◽  
Vol 2 (10) ◽  
pp. 1929-1939 ◽  
Author(s):  
Mariette Barthes ◽  
Juegen Eckert ◽  
Susanna W. Johnson ◽  
Jacques Moret ◽  
Basil I. Swanson ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Vibrational Modes

Inelastic neutron scattering study of icosahedral AlFeCu quasicrystal

1992 ◽  
Vol 2 (2) ◽  
pp. 125-130 ◽  
Author(s):  
M. Quilichini ◽  
B. Hennion ◽  
G. Heger ◽  
S. Lefebvre ◽  
A. Quivy
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Scattering Study ◽  
Neutron Scattering Study
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