title: Strain Compensation in Single ZnSe/CdSe Quantum Wells: Analytical Model and Experimental Evidence.
abstract: The lattice mismatch between CdSe and ZnSe is known to limit the thickness of ZnSe/CdSe quantum wells on GaAs (001) substrates to about 2-3 monolayers. We demonstrate that this thickness can be enhanced significantly by using In0.12Ga0.88As pseudo substrates, which generate alternating tensile and compressive strains in the ZnSe/CdSe/ZnSe layers resulting in an efficient strain compensation. This method enables to design CdSe/ZnSe quantum wells with CdSe thicknesses ranging from 1 to 6 monolayers, covering the whole visible spectrum. The strain compensation effect is investigated by high resolution transmission electron microscopy and supported by molecular statics simulations. The model approach with the supporting experimental measurements is sufficiently general to be also applied to other highly mismatched material combinations for the design of advanced strained heterostructures.
authors.affiliation: Peter Grünberg Institute 9 and JARA-FIT, Forschungszentrum Jülich GmbH , Wilhelm Johnen Strasse, 52425 Jülich, Germany.
authors.forename: Torsten
authors.identifier: http://orcid.org/0000-0003-4873-4022
authors.initials: T
authors.lastname: Rieger
authors.affiliation: Department of Physics, University of Paderborn , Warburger Strasse 100, 33098 Paderborn, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Riedl
authors.affiliation: Peter Grünberg Institute 8 and JARA-FIT, Forschungszentrum Jülich GmbH , Wilhelm Johnen Strasse, 52425 Jülich, Germany.
authors.forename: Elmar
authors.initials: E
authors.lastname: Neumann
authors.affiliation: Peter Grünberg Institute 9 and JARA-FIT, Forschungszentrum Jülich GmbH , Wilhelm Johnen Strasse, 52425 Jülich, Germany.
authors.forename: Detlev
authors.initials: D
authors.lastname: Grützmacher
authors.affiliation: Department of Physics, University of Paderborn , Warburger Strasse 100, 33098 Paderborn, Germany.
authors.forename: Jörg K N
authors.initials: JK
authors.lastname: Lindner
authors.affiliation: Peter Grünberg Institute 9 and JARA-FIT, Forschungszentrum Jülich GmbH , Wilhelm Johnen Strasse, 52425 Jülich, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Pawlis
keywords: critical thickness; geometric phase analysis; molecular beam epitaxy; molecular statics simulations; quantum well; strain compensation