First-Principles Method of Propagation of Tightly Bound Excitons: Verifying the Exciton Band Structure of LiF with Inelastic x-Ray Scattering
學年 102
學期 1
出版（發表）日期 2013-10-08
作品名稱 First-Principles Method of Propagation of Tightly Bound Excitons: Verifying the Exciton Band Structure of LiF with Inelastic x-Ray Scattering
作品名稱（其他語言）
著者 Lee, Chi-Cheng; Chen, Xiaoqian M.; Gan, Yu; Yeh, Chen-Lin; Hsueh, Hung-Chung; Peter Abbamomte; Ku, Wei
單位
出版者
著錄名稱、卷期、頁數 Phys. Rev. Lett. 111(15), 157401
摘要 We propose a simple first-principles method to describe the propagation of tightly bound excitons. By viewing the exciton as a composite object (an effective Frenkel exciton in Wannier orbitals), we define an exciton kinetic kernel to encapsulate the exciton propagation and decay for all binding energies. Applied to prototypical LiF, our approach produces three exciton bands, which we verified quantitatively via inelastic x-ray scattering. The proposed real-space picture is computationally inexpensive and thus enables study of the full exciton dynamics, even in the presence of surfaces and impurity scattering. It also provides an intuitive understanding to facilitate practical exciton engineering in semiconductors, strongly correlated oxides, and their nanostructures.
關鍵字
語言 en_US
ISSN 1079-7114
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 是
國別 USA
公開徵稿
出版型式 ,電子版
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/117169 )