title: Characterization of the cleaved edge cross section of the heterostructures with GaMnAs layer by the confocal micro-Raman spectroscopy.
abstract: Confocal micro-Raman spectroscopy was used to measure cross-section linescans of the cleaved edge of heterostructures involving a GaMnAs layer. The investigations revealed a shift of the TO mode in the compressed GaMnAs layer to high frequencies relative to the TO GaAs mode in the substrate and to low frequencies in the tensile GaMnAs layers. These results are in agreement with the different manifestations of the anomalous Hall effect in the GaMnAs layers, with either compressive or tensile strains. It is shown that Raman spectroscopy is an appropriate method for the investigation of cross-sectional semiconductor heterostructures whose total thickness is comparable to the size of the analyzing laser spot.
authors.affiliation: Lobachevsky State University of Nizhny Novgorod, Gagarina pr. 23/3, 603950 Nizhny Novgorod, Russia. Electronic address: kudrin@nifti.unn.ru.
authors.forename: A V
authors.initials: AV
authors.lastname: Kudrin
authors.affiliation: Lobachevsky State University of Nizhny Novgorod, Gagarina pr. 23/3, 603950 Nizhny Novgorod, Russia.
authors.forename: S M
authors.initials: SM
authors.lastname: Plankina
authors.affiliation: Lobachevsky State University of Nizhny Novgorod, Gagarina pr. 23/3, 603950 Nizhny Novgorod, Russia.
authors.forename: O V
authors.initials: OV
authors.lastname: Vikhrova
authors.affiliation: Lobachevsky State University of Nizhny Novgorod, Gagarina pr. 23/3, 603950 Nizhny Novgorod, Russia.
authors.forename: A V
authors.initials: AV
authors.lastname: Nezhdanov
authors.affiliation: Lobachevsky State University of Nizhny Novgorod, Gagarina pr. 23/3, 603950 Nizhny Novgorod, Russia.
authors.forename: A I
authors.initials: AI
authors.lastname: Mashin
authors.affiliation: Institute for Physics of Microstructures, RAS, 603950 Nizhny Novgorod, Russia.
authors.forename: Yu N
authors.initials: YN
authors.lastname: Drozdov
authors.affiliation: Lobachevsky State University of Nizhny Novgorod, Gagarina pr. 23/3, 603950 Nizhny Novgorod, Russia.
authors.forename: A V
authors.initials: AV
authors.lastname: Shvetsov
keywords: Raman spectroscopy; Semiconductor heterostructures; Spintronics