Interplay of surface and Dirac plasmons in topological insulators: the case of Bi2Se3

Эндаумент фонд ТГУ!
Впиши своё имя в историю университета
- Сделать пожертвование -

Add to "Quick Collection"

Description	Size	Format
Interplay of surface and Dirac plasmons in topological insulators: the case of Bi2Se3	1 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1103/PhysRevLett.115.216802

Title: Interplay of surface and Dirac plasmons in topological insulators: the case of Bi2Se3
Creator: Politano, Antonio
|
Nechaev, Ilya A.
|
Vitiello, Miriam S.
|
Viti, Leonardo
|
Aliev, Ziya S.
|
Babanly, Mahammad B.
|
Chiarello, G.
|
Echenique, Pedro Miguel
|
Chulkov, Evgueni V.
|
Silkin, V. M.
Contributor: Томский государственный университет Физический факультет Кафедра физики металлов
Date: 2015
DOI: 10.1103/PhysRevLett.115.216802
Description: We have investigated plasmonic excitations at the surface of Bi2Se3(0001) via high-resolution electron energy loss spectroscopy. For low parallel momentum transfer q∥, the loss spectrum shows a distinctive feature peaked at 104 meV. This mode varies weakly with q∥. The behavior of its intensity as a function of primary energy and scattering angle indicates that it is a surface plasmon. At larger momenta (q∥∼0.04 Å−1), an additional peak, attributed to the Dirac plasmon, becomes clearly defined in the loss spectrum. Momentum-resolved loss spectra provide evidence of the mutual interaction between the surface plasmon and the Dirac plasmon of Bi2Se3. The proposed theoretical model accounting for the coexistence of three-dimensional doping electrons and two-dimensional Dirac fermions accurately represents the experimental observations. The results reveal novel routes for engineering plasmonic devices based on topological insulators.

Created: 17-05-2016

6764 Visitors

6548 Hits

408 Downloads

Физический факультет Interplay of surface and Dirac plasmons in topological insulators: the case of Bi2Se3