Dirac energy spectrum and inverted band gap in metamorphic InAsSb/InSb superlattices

Abstract

A Dirac-type energy spectrum was demonstrated in gapless ultra-short-period metamorphic InAsSb/InSb superlattices by angle-resolved photoemission spectroscopy (ARPES_ measurements. The Fermi velocity value 7.4x10^5 m/s in a gapless superlattice with a period of 6.2nm is in a good agreement with the results of magneto-absorption experiments. An "inverted" bandgap opens in the center of the Brillouin zone at higher temperatures and in the SL with a larger period. The ARPES data indicate the presence of a surface electron accumulation layer

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Cited by in corpus (3)

• Giant $g$-factors and fully spin-polarized states in metamorphic short-period InAsSb/InSb superlattices
• $g$-factor engineering with InAsSb alloys toward zero band gap limit
• Possible Topological Superconductivity in a Topological Crystalline Insulator (Pb${}_{1-x}$Sn${}_x$)${}_{1-y}$In${}_y$Te