| Dynamical linear response of TDDFT with LDA+U functional: Strongly hybridized Frenkel excitons in NiO | |
|---|---|
| 學年 | 99 |
| 學期 | 1 |
| 出版（發表）日期 | 2010-08-30 |
| 作品名稱 | Dynamical linear response of TDDFT with LDA+U functional: Strongly hybridized Frenkel excitons in NiO |
| 作品名稱（其他語言） | |
| 著者 | Lee, Chi-Cheng; Hsueh, H.C.; Ku, Wei |
| 單位 | 淡江大學物理學系 |
| 出版者 | College Park: American Physical Society |
| 著錄名稱、卷期、頁數 | Physical Review B 82(8), 081106(4pages) |
| 摘要 | Within the framework of time-dependent density-functional theory (TDDFT), we derive the dynamical linear response of local-density approximation plus U functional and benchmark it on NiO, a prototypical Mott insulator. Formulated using real-space Wannier functions, our computationally inexpensive framework gives detailed insights into the formation of tightly bound Frenkel excitons with reasonable accuracy. Specifically, a strong hybridization of multiple excitons is found to significantly modify the exciton properties. Furthermore, our study exposes a significant generic limitation of adiabatic approximation in TDDFT with hybrid functionals and in existing Bethe-Salpeter-equation approaches, advocating the necessity of strongly energy-dependent kernels in future development. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 1550-235X 1098-0121 |
| 期刊性質 | |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | 紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/72753 ) |
| SDGS | 優質教育 |
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