Electronic Structure of the Dilute Magnetic Semiconductor $G{a}_{1-x}M{n}_{x}P$ from Hard X-ray Photoelectron Spectroscopy and Hard X-ray Angle-Resolved Photoemission

Abstract

We have investigated the electronic structure of the dilute magnetic semiconductor (DMS) $G{a}_{0.98}M{n}_{0.02}P$ and compared it to that of an undoped $GaP$ reference sample, using hard X-ray photoelectron spectroscopy (HXPS) and hard X-ray angle-resolved photoemission spectroscopy (HARPES) at energies of about 3 keV. We present experimental data, as well as theoretical calculations, in order to understand the role of the Mn dopant in the emergence of ferromagnetism in this material. Both core-level spectra and angle-resolved or angle-integrated valence spectra are discussed. In particular, the HARPES experimental data are compared to free-electron final-state model calculations and to more accurate one-step photoemission theory. The experimental results show differences between $G{a}_{0.98}M{n}_{0.02}P$ and $GaP$ in both angle-resolved and angle-integrated valence spectra. The $G{a}_{0.98}M{n}_{0.02}P$ bands are broadened due to the presence of Mn impurities that disturb the long-range translational order of the host $GaP$ crystal. Mn-induced changes of the electronic structure are observed over the entire valence band range, including the presence of a distinct impurity band close to the valence-band maximum of the DMS. These experimental results are in good agreement with the one-step photoemission calculations, and a prior HARPES study of $G{a}_{0.97}M{n}_{0.03}As$ and $GaAs$ (Gray et al. Nature Materials 11, 957 (2012)), demonstrating the strong similarity between these two materials. The Mn 2p and 3s core-level spectra also reveal an essentially identical state in doping both $GaAs$ and $GaP$.

arXiv comment37 pages (double spaced) 10 figures

References in corpus (10)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Ferromagnetism in semiconductors and oxides: prospects from a ten years' perspective
• Dilute ferromagnetic semiconductors: Physics and spintronic structures
• The Galaxies Beamline at SOLEIL Synchrotron: Inelastic X-ray Scattering and Photoelectron Spectroscopy in the Hard X-ray Range
• Unveiling the impurity band inducing ferromagnetism in magnetic semiconductor (Ga,Mn)As
• Electron correlations in Mn${}_x$Ga${}_{1-x}$As as seen by resonant electron spectroscopy and dynamical mean field theory
• Identifying the electronic character and role of the Mn states in the valence band of (Ga,Mn)As
• Superconductor to Mott insulator transition in YBa${}_2$Cu${}_3$O${}_7$/LaCaMnO${}_3$ heterostructures
• Depth-Resolved Composition and Electronic Structure of Buried Layers and Interfaces in a LaNiO${}_3$/SrTiO${}_3$ Superlattice from Soft- and Hard- X-ray Standing-Wave Angle-Resolved Photoemission
• Compensation-dependence of magnetic and electrical properties in Ga1-xMnxP

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