Optical and ESR analysis of the Fe acceptor in InP

Koschel, W.; Kaufmann, U.; Bishop, S. G.

doi:10.1016/0038-1098(77)90308-8

Cited by 92 publications

(19 citation statements)

References 12 publications

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“…Symmetry selection rules for individual transitions between spin-orbit levels of the 5 E and 5 T 2 states are displayed in Table 4. The ( 5 E → 5 T 2 ) transition has been observed by absorption and luminescence experiments in ZnS [80][81][82], CdTe [80], GaN [83], GaAs [48,72], GaP [84], InP [85][86][87] Γ ( T ) levels should be observed in absorption spectra, according to Fig. 10 and selection rules (Table 4).…”

Section: T 2 ) Transitionmentioning

confidence: 99%

Fe in III–V and II–VI semiconductors

Malguth

Hoffmann

Phillips

2008

Physica Status Solidi (b)

114

110

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Many theoretical and experimental studies deal with the realization of room‐temperature ferromagnetism in dilute magnetic semiconductors (DMS). However, a detailed quantitative understanding of the electronic properties of transition metal doped semiconductors has often been neglected. This article points out which issues concerning electronic states and charge transfers need to be considered using Fe as an example. Methods to address these issues are outlined, and a wealth of data on the electronic properties of Fe doped III–V and II–VI compound semiconductors that have been obtained over a few decades is reviewed thoroughly. The review is complemented by new results on the effective‐mass‐like state consisting of a hole bound to Fe2+ forming a shallow acceptor state.The positions of established Fe3+/2+ and Fe2+/1+ charge transfer levels are summarized and predictions on the positions of further charge transfer levels are made based on the internal reference rule. The Fe3+/4+ level has not been identified unambiguously in any of the studied materials. Detailed term schemes of the observed charge states in tetrahedral and trigonal crystal field symmetry are presented including hyperfine structure, isotope effects and Jahn–Teller effect. Particularly, the radiative transitions Fe3+(4T1 → 6A1) and Fe2+(5E → 5T2) are analyzed in great detail.An effective‐mass‐like state [Fe2+, h] consisting of a hole bound to Fe2+ is of great significance for a potential realization of spin‐coupling in a DMS. New insights on this shallow acceptor state could be obtained by means of stress dependent and temperature dependent absorption experiments in the mK range. The binding energy and effective Bohr radius were determined for GaN, GaP, InP and GaAs and a weak exchange interaction between the hole and the Fe2+ center was detected.With regard to the Fe3+ ground state, 6A1, in GaP and InP, the hyperfine structure level Γ8 was found to be above the Γ8 level.All results are discussed with respect to a potential realization of a ferromagnetic spin‐coupling in DMSs. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Section: T 2 ) Transitionmentioning

confidence: 99%

Fe in III–V and II–VI semiconductors

Malguth

Hoffmann

Phillips

2008

Physica Status Solidi (b)

114

110

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“…Often, the Fe 2+ state is dominant and gives rise to internal transitions within the d shell of the impurity that are observable with luminescence or optical absorption techniques. This was first demonstrated by Koschel et al [1] who observed, in the photoluminescence spectrum of InP:Fe, four well resolved zero-phonon lines with energies and intensities in agreement with transitions between spin-orbit-split levels of Fe 2+ in a crystal field of T d symmetry. Similar conclusions were obtained by West et al [3] who performed detailed piezospectroscopic and Zeeman studies of the photoluminescence of GaP:Fe.…”

Section: Introductionmentioning

confidence: 52%

“…Most previous theoretical papers have focused on the interpretation of the emission spectrum related to electric-dipole transitions from the 5 spin-orbit-split state (see figure 1) to the ground state 1 . However, very little consideration [11] has been given to the absorption measurements.…”

Section: Discussion and Comparison Between Theory And Experimentsmentioning

confidence: 99%

“…This is done by restricting the Hamiltonian basis to a subset of states containing only the two symmetry-adapted wave functions | ; A (5) (0) and | ; E (5) (1) . These two states are the predominant contribution to the 5 a and 5 levels.…”

Section: Discussion and Comparison Between Theory And Experimentsmentioning

confidence: 99%

“…Different charge states of iron occur in III-V semiconductors [1,2]. In addition to the neutral Fe 3+ (3d 5 ) state, the presence of the one-electron trap state Fe 2+ (3d 6 ) has been detected, as well as, on occasions, the Fe + (3d 7 ) state.…”

Section: Introductionmentioning

confidence: 96%

See 2 more Smart Citations

The effect of electron-phonon interaction in iron-doped III-V cubic semiconductors

Colignon

Kartheuser

Villeret

2000

J. Phys.: Condens. Matter

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Abstract.A theoretical study of optical absorption and emission measurements of Fe 2+ as a substitutional impurity in InP and GaP is presented. A new interpretation of the low-temperature absorption spectrum is proposed based on a weak Jahn-Teller interaction between the electronic excited states and a local gap mode of 5 symmetry. The model also includes the crystal potential, hybridization with the orbitals of the ligands of the host crystal, spin-orbit interaction and a weak dynamic Jahn-Teller coupling of the orbital ground state of Fe 2+ with transverse acoustic phonons of 3 symmetry. The theoretical model describes with good accuracy the measured positions and relative intensities of the spectral lines. In addition, the mass dependence of the local gap mode of 5 symmetry reproduces the general features of the fine structures associated with the isotopic shifts of the zero-phonon line and the contribution to the isotopic shifts arising from the difference in zero-point energy between the initial and final states of the transition is evaluated.

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