کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1623107 | 1516407 | 2009 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electronic structure of layer type tungsten metal dichalcogenides WX2 (X = S, Se) using Compton spectroscopy: Theory and experiment Electronic structure of layer type tungsten metal dichalcogenides WX2 (X = S, Se) using Compton spectroscopy: Theory and experiment](/preview/png/1623107.png)
In this paper, we report the first ever experimental Compton profile study of WS2 and WSe2 employing 20 Ci 137Cs Compton spectrometer. To interpret our experimental data, the electronic properties of these compounds have been determined by linear combination of atomic orbitals, full potential linearised augmented plane-wave and spin polarised relativistic Korringa–Kohn–Rostoker (SPR-KKR) schemes. The band structure calculations show that both the WS2 and WSe2 are indirect-gap semiconductors. The SPR-KKR calculations are found to be relatively in poor agreement with the experimental electron momentum densities. The relative nature of bonding in both the dichalcogenides is explained in terms of equal-valence-electron-density profiles, Mulliken's population and valence band charge densities.
Journal: Journal of Alloys and Compounds - Volume 470, Issues 1–2, 20 February 2009, Pages 452–460