Discrimination Of Conductive Surface Electron States By Laser Terahertz Radiation In Pbse-A Base For Pb1-XSnXSe Topological Crystalline Insulators

Keywords

IV-VI semiconductor materials; photoelectro magnetic effect; surface conductivity; terahertz; Topological insulators (TIs)

Abstract

We report on the influence of oxidation on features of surface electron states in PbSe films-materials belonging to the family of topological crystalline insulators Pb1-xSnxSe. These states are detected through observation of the photoelectromagnetic effect induced by terahertz laser pulses. It is demonstrated that highly conductive surface electron states in PbSe are inherent to the semiconductor itself and are not related to the material oxidation. This allows excluding surface states induced by oxidation as a reason for high surface conductivity in topological crystalline insulators based on Pb1-xSnxSe.

Publication Date

7-1-2015

Publication Title

IEEE Transactions on Terahertz Science and Technology

Volume

5

Issue

4

Number of Pages

659-664

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TTHZ.2015.2436712

Socpus ID

85027948637 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85027948637

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