2008年1月
Effects of Electron Correlation and Electron-phonon Coupling on the quantum state of a Silicon Vacancy
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- ,
- ,
- 巻
- 77
- 号
- Suppl. A
- 開始ページ
- 266
- 終了ページ
- 268
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1143/JPSJS.77SA.266
- 出版者・発行元
- PHYSICAL SOC JAPAN
Recently, Goto et al. have discovered an anomalous elastic softening due to the vacancy in the crystalline silicon at low temperature by using the ultrasonic measurements. To investigate the quantum state of the silicon vacancy, we introduce a cluster model which includes both the Coulomb interaction between electrons in the dangling bond and the coupling between the electrons and Jahn-Teller phonons. We solve the model by using the numerical diagonalization method and find that the V-0 state with neutral charge shows a transition from S=0 to S=1 in the strong coupling regime. Remarkably, the V+ state with S = 1/2 becomes stable due to the trigonal phonon while unstable due to the tetragonal phonon. The obtained result with the trigonal phonon is consistent with the elastic softening in the B-doped silicon.
- リンク情報
- ID情報
-
- DOI : 10.1143/JPSJS.77SA.266
- ISSN : 0031-9015
- Web of Science ID : WOS:000209384500056