دراسة البنية الإلكترونية لبلورة Bi12SiO20بوساطة الانعكاس الضوئي*

Authors

  • برهان دالاتي
  • عمار صارم

Abstract

تم قياس معامل طيف انعكاس البلورة الأحادية Bi12SiO20 في مجال الطاقة (1,5-12 eV) في درجة حرارة الغرفة لوحظ في طيف الانعكاس بنية غنية مطابقة للانتقالات الإلكترونية بين العصابات. تم تفسير البنية الضوئية الملاحظة في طيف الانعكاس بدلالة الانتقالات ما بين السويات O2-(2p) وعدد من عصابات الناقلية. حدد مخطط عصابات الطاقة بشكل رئيسي بوساطة بنية الشبكة بزموث-أكسجين. وقد تبين أن الانتقالات الضوئية تحدث عند النقاط السرجية (Saddle points) على المستقيم G-P(L). وإن احتمال الانتقالات الضوئية عند النقطتينP و H ضعيف بسبب انخفاض كثافة الاحتمالات المتوقع هناك.

The normal-incidence reflectance spectrum of Bi12SiO20 single crystal in the energy range from 1.5 to 12 eV at room temperature has been measured. A rich structure corresponding to the optical interband transitions were observed in the reflectivity spectrum. The observed optical structures in the spectrum were interpreted in terms of transitions between O2-(2p) levels and the various conduction bands. The energy band scheme of Bi12SiO20 is determined mainly by the bismuth and oxygen net structure. The optical transitions occur at the saddle points on the G-P(L) line. The probability of transitions at the P and H points is low, because of the density of states is expected to be low there.

Downloads

Published

2018-11-29

How to Cite

1.
دالاتي ب, صارم ع. دراسة البنية الإلكترونية لبلورة Bi12SiO20بوساطة الانعكاس الضوئي*. TUJ-BA [Internet]. 2018Nov.29 [cited 2024May2];23(1). Available from: https://journal.tishreen.edu.sy/index.php/bassnc/article/view/4871

Issue

Vol. 23 No. 1 (2001): العلوم الأساسية

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

The authors retain the copyright and grant the right to publish in the magazine for the first time with the transfer of the commercial right to the Tishreen University Journal -Basic Sciences Series  

 Under a CC BY- NC-SA 04 license that allows others to share the work with of the work's authorship and initial publication in this journal. Authors can use a copy of their articles in their scientific activity, and on their scientific websites, provided that the place of publication is indicted in Tishreen University Journal -Basic Sciences Series .  The Readers have the right to send, print and subscribe to the initial version of the article, and the title of Tishreen University Journal -Basic Sciences Series   Publisher

 

journal uses a CC BY-NC-SA license which mean

You are free to:

  • Adapt — remix, transform, and build upon the material
  •  
  • The licensor cannot revoke these freedoms as long as you follow the license terms.

 

  • Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • NonCommercial — You may not use the material for commercial purposes.
  • ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
  • No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

Most read articles by the same author(s)

1 2 > >>