Application of Wannier Functions on the dynamics of strongly bounded excitons
碩士 === 淡江大學 === 物理學系碩士班 === 98 === A first-principles Wannier-function method is proposed to explore the propagation of the strongly bound Frenkel exciton in Alkali Halides ( LiF, LiCl, LiBr, NaF, NaCl, and NaBr). This study find strongly angular dependence of the excitons by means of a dire...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2010
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| Online Access: | http://ndltd.ncl.edu.tw/handle/91906417603560189269 |
| Summary: | 碩士 === 淡江大學 === 物理學系碩士班 === 98 === A first-principles Wannier-function method is proposed to explore the propagation of the strongly bound Frenkel exciton in Alkali Halides ( LiF, LiCl, LiBr, NaF, NaCl, and NaBr).
This study find strongly angular dependence of the excitons by means of a direct product of the Fourier transform of the local particle-hole wave functions.
This result can straightforward explain the angular resolved inelastic x-ray scattering experiment. Furthermore, in order to solve response function of strongly interacting system within the linear response scheme more effectively, a new approach is proposed by formulating the “effective two-particle kinetic kernel (T) ” which contains all the mobility information of excitons.
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