教師資料查詢 | 類別: 期刊論文 | 教師: 李啟正 LEE, CHI-CHENG (瀏覽個人網頁)

標題: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Chi-Cheng Lee, Xiaoqian M. Chen, Yu Gan, Chen-Lin Yeh, H. C. Hsueh, Peter Abbamonte, and Wei Ku
單位
出版者
著錄名稱、卷期、頁數Phys. Rev. Lett. 111(15), p.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
語言英文(美國)
ISSN
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別美國
公開徵稿
出版型式,電子版
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