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29 March 2024
 
  » arxiv » 1306.0043

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Quasiparticle Interference on the Surface of Topological Crystalline Insulator Pb(1-x)Sn(x)Se
A. Gyenis ; I. K. Drozdov ; S. Nadj-Perge ; O. B. Jeong ; J. Seo ; I. Pletikosic ; T. Valla ; G. D. Gu ; A. Yazdani ;
Date 1 Jun 2013
AbstractTopological crystalline insulators represent a novel topological phase of matter in which the surface states are protected by discrete point group-symmetries of the underlying lattice. Rock-salt lead-tin-selenide alloy is one possible realization of this phase which undergoes a topological phase transition upon changing the lead content. We used scanning tunneling microscopy (STM) and angle resolved photoemission spectroscopy (ARPES) to probe the surface states on (001) Pb(1-x)Sn(x)Se in the topologically non-trivial (x=0.23) and topologically trivial (x=0) phases. We observed quasiparticle interference with STM on the surface of the topological crystalline insulator and demonstrated that the measured interference can be well understood from ARPES studies and a simple band structure model. Furthermore, our findings support the fact that Pb(0.77)Sn(0.23)Se and PbSe have different topological nature.
Source arXiv, 1306.0043
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