Dirac energy spectrum and inverted bandgap in metamorphic InAsSb/InSb superlattices

Sergey Suchalkin; Maksim Ermolaev; Tonica Valla; Gela Kipshidze; Dmitry Smirnov; Seongphill Moon; Mykhaylo Ozerov; Zhigang Jiang; Yuxuan Jiang; Stefan P. Svensson; Wendy L. Sarney; Gregory Belenky

doi:10.1063/1.5128634

Dirac energy spectrum and inverted bandgap in metamorphic InAsSb/InSb superlattices

Sergey Suchalkin
, Maksim Ermolaev
, Tonica Valla
, Gela Kipshidze
, Dmitry Smirnov
, Seongphill Moon
, Mykhaylo Ozerov
, Zhigang Jiang
, Yuxuan Jiang
, Stefan P. Svensson
, Wendy L. Sarney
, Gregory Belenky

Stony Brook University
Brookhaven National Laboratory
National High Magnetic Field Laboratory
Florida State University
Georgia Institute of Technology
U.S. Army Research Laboratory

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

A Dirac-type energy spectrum was demonstrated in gapless ultrashort-period metamorphic InAsSb/InSb superlattices by angle-resolved photoemission spectroscopy (ARPES) measurements. The Fermi velocity value of 7.4 × 10⁵ m/s in a gapless superlattice with a period of 6.2 nm is in good agreement with the results of magnetoabsorption experiments. An "inverted" bandgap opens in the center of the Brillouin zone at higher temperatures and in the superlattice with a larger period. The ARPES data indicate the presence of a surface electron accumulation layer.

Original language	English
Article number	032101
Journal	Applied Physics Letters
Volume	116
Issue number	3
DOIs	https://doi.org/10.1063/1.5128634
State	Published - Jan 21 2020

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title = "Dirac energy spectrum and inverted bandgap in metamorphic InAsSb/InSb superlattices",

abstract = "A Dirac-type energy spectrum was demonstrated in gapless ultrashort-period metamorphic InAsSb/InSb superlattices by angle-resolved photoemission spectroscopy (ARPES) measurements. The Fermi velocity value of 7.4 × 105 m/s in a gapless superlattice with a period of 6.2 nm is in good agreement with the results of magnetoabsorption experiments. An {"}inverted{"} bandgap opens in the center of the Brillouin zone at higher temperatures and in the superlattice with a larger period. The ARPES data indicate the presence of a surface electron accumulation layer.",

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doi = "10.1063/1.5128634",

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T1 - Dirac energy spectrum and inverted bandgap in metamorphic InAsSb/InSb superlattices

AU - Suchalkin, Sergey

AU - Ermolaev, Maksim

AU - Valla, Tonica

AU - Kipshidze, Gela

AU - Smirnov, Dmitry

AU - Moon, Seongphill

AU - Ozerov, Mykhaylo

AU - Jiang, Zhigang

AU - Jiang, Yuxuan

AU - Svensson, Stefan P.

AU - Sarney, Wendy L.

AU - Belenky, Gregory

PY - 2020/1/21

Y1 - 2020/1/21

N2 - A Dirac-type energy spectrum was demonstrated in gapless ultrashort-period metamorphic InAsSb/InSb superlattices by angle-resolved photoemission spectroscopy (ARPES) measurements. The Fermi velocity value of 7.4 × 105 m/s in a gapless superlattice with a period of 6.2 nm is in good agreement with the results of magnetoabsorption experiments. An "inverted" bandgap opens in the center of the Brillouin zone at higher temperatures and in the superlattice with a larger period. The ARPES data indicate the presence of a surface electron accumulation layer.

AB - A Dirac-type energy spectrum was demonstrated in gapless ultrashort-period metamorphic InAsSb/InSb superlattices by angle-resolved photoemission spectroscopy (ARPES) measurements. The Fermi velocity value of 7.4 × 105 m/s in a gapless superlattice with a period of 6.2 nm is in good agreement with the results of magnetoabsorption experiments. An "inverted" bandgap opens in the center of the Brillouin zone at higher temperatures and in the superlattice with a larger period. The ARPES data indicate the presence of a surface electron accumulation layer.

UR - https://www.scopus.com/pages/publications/85078670499

U2 - 10.1063/1.5128634

DO - 10.1063/1.5128634

M3 - Article

AN - SCOPUS:85078670499

SN - 0003-6951

VL - 116

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 3

M1 - 032101

ER -

Dirac energy spectrum and inverted bandgap in metamorphic InAsSb/InSb superlattices

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