Impact of Ultrathin Pb Films on the Topological Surface and Quantum-Well States of Bi{sub 2}Se{sub 3} and Sb{sub 2}Te{sub 3} Topological Insulators

Journal Article · Sun Apr 15 00:00:00 EDT 2018 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776118040088· OSTI ID:22749897

Klimovskikh, I. I.; Sostina, D. M. ^[1]; Kokh, K. A. ^[2]; Tereshchenko, O. E. ^[3]; Shikin, A. M. ^[1]

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1. St. Petersburg State University (Russian Federation)
2. Russian Academy of Sciences, Sobolev Institute of Geology and Mineralogy, Siberian Branch (Russian Federation)
3. Novosibirsk State University (Russian Federation)

The effect of an ultrathin Pb film deposited on the surface of Bi{sub 2}Se{sub 3} and Sb{sub 2}Te{sub 3} compounds on the electronic state structure of topological insulators is studied experimentally by the angle-resolved photoemission spectroscopy (ARPES) technique. The following features are revealed: formation of two-dimensional quantum-well states in the near-surface region, an increase in the binding energy of the Dirac cone and the core levels, and a simultaneous electronic states intensity redistribution in the system in photoemission spectra. The results obtained show that topological states may coexist at the interface between studied materials and a superconductor, which seems to be promising for application in quantum computers.

• OSTI ID: 22749897
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 126, Issue 4; Other Information: Copyright (c) 2018 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANTIMONY TELLURIDES
BINDING ENERGY
BISMUTH SELENIDES
FILMS
PHOTOELECTRON SPECTROSCOPY
QUANTUM COMPUTERS
QUANTUM WELLS
TWO-DIMENSIONAL CALCULATIONS