Surface Chemical Treatment Effect on (1 1 1) PbSnTe < In > Topological Crystalline Insulator Films Full article
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Applied Surface Science
ISSN: 0169-4332 |
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| Output data | Year: 2021, Volume: 569, Article number : 150930, Pages count : 6 DOI: 10.1016/j.apsusc.2021.150930 | ||||||||
| Tags | Electronic structure; MBE; Photoemission; Surface treatment; Topological crystalline insulator | ||||||||
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Abstract:
In present work, the effect of Pb1-xSnxTe < In> (111) surface chemical treatment on electrophysical and optical
properties was studied. It was shown that treatment of Pb1-xSnxTe < In> (111) surface in HCl-isopropanol (HCliPA) solution led to removal of native oxides and surface enrichment by elemental tellurium of several nm
thickness. Subsequent anneals in vacuum led to desorption of elemental tellurium and revealing (1x1) surface
structure. We present angle resolved photoemission spectroscopy (ARPES) measurements of the surface states on chemically prepared (111) oriented MBE-grown films of Pb1-xSnxTe, a three-dimensional topological crystalline insulator (TCI). The surface states with Dirac-like dispersion at Γ in the surface Brillouin zone were detected. The dark current and photocurrent were found in strong dependence on the surface chemical procedure and composition. The relative simplicity of the preparation technique is encouraging, and suggests a clear path for future investigations of TCI states on alternative surface orientations in (Pb,Sn)Te solid solutions and applied aspects of TCI research.
Cite:
Tarasov A.S.
, Ishchenko D.V.
, Akhundov I.O.
, Golyashov V.A.
, Klimov A.E.
, Suprun S.P.
, Fedosenko E.V.
, Sherstyakova V.N.
, Rybkin A.G.
, Vilkov O.Y.
, Tereshchenko O.E.
Surface Chemical Treatment Effect on (1 1 1) PbSnTe < In > Topological Crystalline Insulator Films
Applied Surface Science. 2021. V.569. 150930 :1-6. DOI: 10.1016/j.apsusc.2021.150930 WOS Scopus РИНЦ OpenAlex ANCAN
Surface Chemical Treatment Effect on (1 1 1) PbSnTe < In > Topological Crystalline Insulator Films
Applied Surface Science. 2021. V.569. 150930 :1-6. DOI: 10.1016/j.apsusc.2021.150930 WOS Scopus РИНЦ OpenAlex ANCAN
Dates:
| Submitted: | Feb 25, 2021 |
| Accepted: | Aug 9, 2021 |
| Published online: | Aug 21, 2021 |
| Published print: | Dec 15, 2021 |
Identifiers:
| ≡ Web of science: | WOS:000711921500003 |
| ≡ Scopus: | 2-s2.0-85113409391 |
| ≡ Elibrary: | 47009585 |
| ≡ OpenAlex: | W3194707363 |
| ≡ Chemical Abstracts: | 2021:1878702 |
| ≡ Chemical Abstracts (print): | 184:326277 |