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Discrimination of Conductive Surface Electron States by Laser Terahertz Radiation in PbSe—A Base for Pb$_{1-x}$Sn$_x$Se Topological Crystalline Insulators

Egorova, Svetlana G. ; Chernichkin, Vladimir I. ; Dudnik, Anna O. ; Kasiyan, Vladimir A. ; Chernyak, Leonid ; Danilov, Sergey N. ; Ryabova, Ludmila I. ; Khokhlov, Dmitry R.



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 ...

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