Detection of highly conductive surface electron states in topological crystalline insulators Pb(1−x)Sn(x)Se using laser terahertz radiation

We suggest a method for detection of highly conductive surface electron states including topological ones. The method is based on measurements of the photoelectromagnetic effect using terahertz laser pulses. In contrast to conventional transport measurements, the method is not sensitive to the bulk...

Descripción completa

Detalles Bibliográficos
Autores principales: Egorova, S. G., Chernichkin, V. I., Ryabova, L. I., Skipetrov, E. P., Yashina, L. V., Danilov, S. N., Ganichev, S. D., Khokhlov, D. R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4476126/
https://www.ncbi.nlm.nih.gov/pubmed/26096529
http://dx.doi.org/10.1038/srep11540
Descripción
Sumario:We suggest a method for detection of highly conductive surface electron states including topological ones. The method is based on measurements of the photoelectromagnetic effect using terahertz laser pulses. In contrast to conventional transport measurements, the method is not sensitive to the bulk conductivity. The method is demonstrated on an example of topological crystalline insulators Pb(1−x)Sn(x)Se. It is shown that highly conductive surface electron states are present in Pb(1−x)Sn(x)Se both in the inverse and direct electron energy spectrum.

Ejemplares similares