Dynamic structure of electrons in Li metal: Inelastic synchrotron x-ray scattering results and interpretation beyond the random-phase approximation

1986 ◽  
Vol 33 (10) ◽  
pp. 6744-6757 ◽  
Author(s):  
W. Schülke ◽  
H. Nagasawa ◽  
S. Mourikis ◽  
P. Lanzki
Keyword(s):  
Random Phase Approximation ◽  
Random Phase ◽  
Dynamic Structure ◽  
Phase Approximation ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Inelastic X-ray scattering in molecular liquids and electron correlation effects

1998 ◽  
Vol 5 (3) ◽  
pp. 1052-1054 ◽  
Author(s):  
Hisashi Hayashi ◽  
Noboru Watanabe ◽  
Yasuo Udagawa
Keyword(s):  
Structure Factor ◽  
Dynamic Structure ◽  
Basis Sets ◽  
Static Structure Factor ◽  
Correlation Effects ◽  
Static Structure ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Spectra ◽  
Ray Scattering

Inelastic X-ray scattering spectra of liquid water and cyclohexane have been measured with 2 eV resolution for a momentum transfer range between 0.69 and 2.77 au at BL16A of the Photon Factory, KEK, Tsukuba. Observed spectra are transformed to the dynamic structure factor which is normalized by using the Bethe sum rule, and the static structure factor is obtained. From a comparison with extended CI calculations by the use of various basis sets, correlation effects are proved to be of vital importance in inelastic X-ray scattering.

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

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.

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