Dynamic Structure Factor and Dielectric Function of Valence Electrons in Lithium Hydride: An Inelastic X‐Ray Scattering Study at Finite Momentum Transfer

2020 ◽  
Vol 257 (6) ◽  
pp. 1900780
Author(s):  
Oscar A. Paredes-Mellone ◽  
Jaakko Koskelo ◽  
Sergio A. Ceppi ◽  
Guillermo E. Stutz
Keyword(s):  
Momentum Transfer ◽  
Dielectric Function ◽  
Structure Factor ◽  
Dynamic Structure ◽  
Lithium Hydride ◽  
Dynamic Structure Factor ◽  
X Ray ◽  
X Ray Scattering ◽  
Valence Electrons ◽  
Scattering Study

The Dynamic Structure Factor of LiC6 and KC8 : Inelastic Synchrotron X-Ray Scattering Results

1993 ◽  
Vol 48 (1-2) ◽  
pp. 283-288 ◽  
Author(s):  
A. Berthold ◽  
K.-J. Gabriel ◽  
W. Schülke
Keyword(s):  
Fermi Level ◽  
Momentum Transfer ◽  
Structure Factor ◽  
Dynamic Structure ◽  
Dynamic Structure Factor ◽  
X Ray ◽  
Intercalated Graphite ◽  
X Ray Scattering ◽  
Strong Hybridization ◽  
Ray Scattering

Abstract The dynamic structure factor S(q, ω) of electrons in lithium-intercalated graphite (LiC6) and potassium-intercalated graphite (KC8) for momentum transfer q || c-axis has been measured by inelastic synchrotron X-ray scattering. The dielectric function ε(q, ω) was deduced from the data and compared with ε(q, ω) of pristine graphite.The main feature in the different Im [ε(q, ω)]-spectra, a more or less intense peak around 14 eV, can be assigned to maxima of the symmetry-projected joint density of occupied and unoccupied electron states near the Fermi level. Knowing the position of the occupied bands by photoemission experiments, predictions about the unoccupied π and interlayer states can be made.In the case of LiC6 , a shift and broadening of the first Im [ε(q, ω)]-peak was found, which can be explained by a decrease of the energy of the interlayer-band because of the strong hybridization of this graphite-derived band with the Li metal 2s-band.In the case of KC8 , a weakening of the first peak of Im [ε(q, ω)] was observed, which we attribute both to a decreasing overlap of the occupied s-derived state with the empty interlayer state and to a change of symmetry of the occupied π-derived states as well as of the empty rc-derived states.

First inelastic x‐ray scattering spectroscopy measurements of the dynamic structure factor S(q,ω) of electrons in a solid noble gas (He)

1995 ◽  
Vol 66 (2) ◽  
pp. 1578-1580 ◽  
Author(s):  
W. Schülke ◽  
A. Kaprolat ◽  
K.‐J. Gabriel ◽  
N. Schell ◽  
E. Burkel ◽  
...  
Keyword(s):  
Structure Factor ◽  
Noble Gas ◽  
Dynamic Structure ◽  
Dynamic Structure Factor ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Inelastic X-ray scattering determination of the dynamic structure factor of liquid lithium

1999 ◽  
Vol 79 (11-12) ◽  
pp. 2027-2035 ◽  
Author(s):  
T. Scopigno ◽  
U. Balucani ◽  
A. Cunsolo ◽  
C. Masciovecchio ◽  
G. Ruocco ◽  
...  
Keyword(s):  
Structure Factor ◽  
Dynamic Structure ◽  
Dynamic Structure Factor ◽  
Liquid Lithium ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Inelastic x-ray scattering studies on dynamic structure factor of polymeric liquid Se under pressure

2015 ◽  
Author(s):  
Masanori Inui ◽  
Yukio Kajihara ◽  
Koji Kimura ◽  
Kazuhiro Matsuda ◽  
Koji Ohara ◽  
...  
Keyword(s):  
Structure Factor ◽  
Dynamic Structure ◽  
Dynamic Structure Factor ◽  
Polymeric Liquid ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering
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