Modification of the Surface Properties of PbSnTe〈In〉 Epitaxial Layers with Composition near Band Inversion

• Published in: Technical physics Vol. 64; no. 11; pp. 1704 - 1708
• Main Authors: Tarasov, A. S., Ishchenko, D. V., Akimov, A. N., Akhundov, I. O., Golyashov, V. A., Klimov, A. E., Pashchin, N. S., Suprun, S. P., Fedosenko, E. V., Sherstyakova, V. N., Tereshchenko, O. E.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-11-2019; Springer Nature B.V
• Subjects: AIR; BARIUM FLUORIDES; Classical and Continuum Physics; Composition; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRYSTAL GROWTH; Dependence; Epitaxial growth; Epitaxial layers; HYDROCHLORIC ACID; Isopropanol; LEAD TELLURIDES; MATERIALS RECOVERY; MOLECULAR BEAM EPITAXY; Organic chemistry; PHOTOCURRENTS; Photoelectric effect; Photoelectric emission; Physics; Physics and Astronomy; RELAXATION; SOLUTIONS; Substrates; SURFACE PROPERTIES; Surface treatment; SURFACE TREATMENTS; TIN TELLURIDES
• ISSN: 1063-7842; 1090-6525
• DOI: 10.1134/S1063784219110264

High-resistance Pb
1 –
x
Sn
x
Te〈In〉 layers grown by molecular beam epitaxy on BaF
2
(111) substrates with compositions close to band inversion have been investigated. The
I–V
characteristics and relaxation dependences of the photocurrent of the structures in dependence on the chemical surface treatment and subsequent exposure of the samples in air have been examined. It has been observed that the characteristics significantly transform depending on the physicochemical surface state. It has been found that the chemical surface treatment in the hydrochloric acid solution in isopropyl alcohol leads to an increase in the current by up to four orders of magnitude with the subsequent recovery of the
I–V
characteristics upon exposure of the samples in air for several days.