Journal Article

PUBDB-2021-01003

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Site-specific atomic order and band structure tailoring in the diluted magnetic semiconductor (In,Ga,Mn)As

Medjanik, K. (Corresponding author) ; Fedchenko, O.Extern* ; Yastrubchak, O. ; Sadowski, J. ; Sawicki, M. ; Gluba, L. ; Vasilyev, D.Extern* ; Babenkov, S.Extern* ; Chernov, S.Extern* ; Winkelmann, A. ; Elmers, H.-J.Extern* ; Schoenhense, G.Extern*

2021
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevB.103.075107  doi:10.3204/PUBDB-2021-01003

Abstract: Diluted ferromagnetic semiconductors combining ferromagnetic and semiconducting properties in one material provide numerous new functionalities, attractive for basic studies and potentially useful for novel device applications. The tailoring of the electronic structure in analogy to conventional semiconductors has yet to be explored. Here, we demonstrate the conservation of broken inversion symmetry and band structure tailoring for high-quality molecular-beam-epitaxy-grown (In,Ga,Mn)As films with 3% In plus 2.5% or 5.6% Mn using hard-x-ray photoelectron diffraction (hXPD) and momentum microscopy. Photon energies of 3–5 keV ensure that the results are not corrupted by surface effects, which are known to be strong in semiconductors. The missing inversion center of the GaAs host lattice leads to fingerprint-like hXPD signatures of As and Ga sites. For both concentrations, Mn predominantly occupies Ga substitutional sites. Momentum microscopy reveals a shift of the chemical potential with increasing Mn doping and a highly dispersing band, crossing the Fermi level for high Mn concentration. The Mn doping induces a pronounced modification of the spin-orbit split-off band.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. PETRA Beamline P22 (PETRA III)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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