TY - JOUR

T1 - Structural and Dynamical Properties of Short-Period GaN/AlN Superlattices

T2 - Experiment and Theory

AU - Eliseyev, I. A.

AU - Davydov, V. Yu

AU - Roginskii, E. M.

AU - Kitaev, Yu E.

AU - Smirnov, A. N.

AU - Yagovkina, M. A.

AU - Nechaev, D. V.

AU - Jmerik, V. N.

AU - Smirnov, M. B.

N1 - Funding Information: The work was supported in part by Russian Foundation for Basic Research (project RFBR-BRICS no. 17-52-80089). XRD characterizations were performed using equipment of the Federal Joint Research Center “Material science and characterization in advanced technology” sponsored by the Ministry of Education and Science of the Russian Federation (id RFMEFI62119X0021). Publisher Copyright: © 2020, Pleiades Publishing, Ltd. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/12

Y1 - 2020/12

N2 - Abstract: We report the results of systematic experimental and theoretical studies of structural and dynamical properties of short-period GaN/AlN superlattices. The multilayer structures with the thicknesses of the constituent layers varying from two to several monolayers are grown using the submonolayer digital molecular beam epitaxy technique. In the framework of density functional theory, the lattice dynamics properties of the superlattices are studied. Good agreement between the experiment and theory is found, which made it possible to establish unambiguously a relationship between the features observed in the Raman spectra and the microscopic nature of the acoustic and optical phonon modes. The results obtained enhance the capabilities of Raman spectroscopy as a fast and non-destructive characterization method of short-period GaN/AlN superlattices and can be used to optimize growth process parameters for the fabrication of structurally perfect low-dimensional heterostructures.

AB - Abstract: We report the results of systematic experimental and theoretical studies of structural and dynamical properties of short-period GaN/AlN superlattices. The multilayer structures with the thicknesses of the constituent layers varying from two to several monolayers are grown using the submonolayer digital molecular beam epitaxy technique. In the framework of density functional theory, the lattice dynamics properties of the superlattices are studied. Good agreement between the experiment and theory is found, which made it possible to establish unambiguously a relationship between the features observed in the Raman spectra and the microscopic nature of the acoustic and optical phonon modes. The results obtained enhance the capabilities of Raman spectroscopy as a fast and non-destructive characterization method of short-period GaN/AlN superlattices and can be used to optimize growth process parameters for the fabrication of structurally perfect low-dimensional heterostructures.

KW - density functional theory

KW - GaN/AlN superlattices

KW - group theory analysis

KW - lattice dynamics

KW - molecular beam epitaxy

KW - Raman spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=85097079783&partnerID=8YFLogxK

U2 - 10.1134/S1063782620120052

DO - 10.1134/S1063782620120052

M3 - Article

AN - SCOPUS:85097079783

VL - 54

SP - 1706

EP - 1709

JO - Semiconductors

JF - Semiconductors

SN - 1063-7826

IS - 12

ER -