Electron Paramagnetic Resonance of Titanium in GaP

Kreissl, J.; Gehlhoff, W.; Ulrici, W.

doi:10.1002/pssb.2221430122

Cited by 15 publications

(4 citation statements)

References 14 publications

(8 reference statements)

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“…This is in accordance with the corresponding photo-EPR results [12]. On the other hand, the high-resistance samples reveal quite pronounced changes of the optical properties under illumination a t temperatures below about 100 K. (i) Illumination with 0.57 eV < hv,,, < 2.3 eV creates an enhancement of the optical absorption in the whole energy region investigated (0.4 eV up to the absorption edge of Gap).…”

Section: Photoinduced Effectssupporting

confidence: 86%

“…band transitions. Only the band with maximum a t 0.95 eV can be assigned with some certainty to the DA recombination transition of P$ as it suggests the comparison with ODMR experiments [24] and the presence of PcaP, antisite centres detected by E P R [12]. A reliable assignment of the other broad PL bands and their possible correlation to the Tirelated levels needs additional experiments.…”

Section: I12 Photoionization Transitions and Photoinduced Reekrging mentioning

confidence: 99%

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Optical and Electrical Studies of GaP: Ti

Ulrici¹,

Friedland²,

Eaves

et al. 1988

Physica Status Solidi (b)

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The results of optical absorption, photoluminescence, electrical conductivity, and Hall-effect measurements on LEC-grown Gap: Ti are reported. The positiom of the Ti$/T& acceptor level at 4, -0.50 eV and the Ti&/T& donor level at E, + 1.0 eV are established and the photoionization transitions from and to these deep levels are identified in the absorption spectra and from recharging processes. The internal transitions 3A, -3T1(F) and + 8T1(P) of T i 3 are found in absorption and the e lT, transitions of Ti$ are seen in the absorption as well as luminescence spectra. The interpretation of these bands and sharp lines requires to take into account different kinds of electron-phonon coupling. Photoinduced recharging experiments at low temperatures on high-resistance GaP:Ti and GaP:Ti: Zn are consistently explained including the three charge states of Ti&, of the P G~P~ antisite defect, and of the residual F~Q~ impurity.Die Ergebnisse von Messungen der optischen Absorption, Photolumineszenz, elektrischen Leitfiihigkeit und des Hall-Effekts an LEC-geziichtetem GaP:Ti werden mitgeteilt. Die Lagen des Ti$/Tig Akzeptorniveaus bei Ec -0.50 eV und des T a / T i % Donatorniveaus bei E , + 1.0 eV werden gesichert und die Photoionisationsiibergange von und zu diesen tiefen Niveaus werden in den Absorptionsspektren und aus Umladungsprozessen identifiziert. Die inneren ubergiinge 3A, + sT1(F) und 4 3T1(P) des Ti ; : werden in Absorption gefunden und die *E cf lT, Ubergiinge

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Section: Photoinduced Effectssupporting

confidence: 86%

Section: I12 Photoionization Transitions and Photoinduced Reekrging mentioning

confidence: 99%

Optical and Electrical Studies of GaP: Ti

Ulrici¹,

Friedland²,

Eaves

et al. 1988

Physica Status Solidi (b)

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“…These transitions are labelled by 1 to 6 in figure 4. In particular, this level scheme, which is totally different from that usually assumed in the literature (see references [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]), shows that:…”

Section: Experimental Details and Resultsmentioning

confidence: 87%

Effects of uniaxial stress on the absorption lines of and the nature of the Jahn-Teller coupling

Al-Shaikh

Qiu

Roura

et al. 1998

J. Phys.: Condens. Matter

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Experiments showing the effects of uniaxial stress on the structure of the zero-phonon line (ZPL) obtained in the optical absorption spectrum from a ion in GaP are described and interpreted using a new theoretical model. It is found that the components of the ZPL are split when the stress is applied along the , and axes. These results together with the spectra observed without applied stress, show that previous energy level diagrams for this centre cannot be correct. A vibronic model is used to describe this system which includes coupling to e modes in the ground states, to both e and modes in the excited excited states and to modes between and . The model is shown also to give a good explanation of the published Zeeman data obtained from photoluminescence measurements as well as the new uniaxial stress data presented here. A brief discussion is given of the type of Jahn-Teller effect operational in this system emphasizing that it is not necessarily of the orthorhombic type in the excited state.

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“…The E P R signals of T i 2 and T i 2 are superimposed. The P-dependence of the E P R signal measured on the n-type Gap: Ti sample clearly demonstrates that a t low P the signal is mainly due to Ti$ [5], whereas at high P the signal is mainly due to Ti& as the T i 2 signal is saturated. The saturation behaviour is a tool to distinguish between the two EPR signals of Ti$ and T i : :…”

Section: Gap:ti3+mentioning

confidence: 91%

Electron Paramagnetic Resonance Study of the Dynamical Jahn‐Teller Effect on the 3d¹ Impurities Ti³⁺ and V⁴⁺ in GaP

Kreissl¹,

Ulrici²,

Gehlhoff³

1989

Physica Status Solidi (b)

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J. KREISSL et al.: EPR Study of the Dynamical Jahn-Teller Effect 597 phys. stat. sol. (b) 165, 597 (1989) Subject classification: 71.55; 76.30; S7.11 Zentrum f u r Wissenschaftlichen Geratebaul) (a) and Zentralinstitut fur Elektronenphysik2) (b) der Akadenzie der Wissenschaften der DDR, Berlin Electron Paramagnetic Resonance Study of the Dynamical Jahn-Teller Effect on the 3dl Impurities TiS+ and V4+ in Gap BY J. KREISSL (a), W. ULRICI (b), and W. GEHLHOFB (a)The EPR spectra of Ti$ and V% in GaP are studied a t T = 20, 4.2, and 1.5 K. At 20 K the spectra are isotropic and become angular-dependent for T 4.2 K. By simuIation of the spectra measured a t T = 1.5 K this angular dependence is explained using the spin-Hamiltonian for a 2E vibronic ground state arising from a weak-to-moderate E @ E dynamical Jahn-Teller effect including internal random strains.Die EPR-Spektren des T i 2 und V g im GaP werden bei T = 20, 4,2 und 1,5 K untersucht. Die bei 20 K isotropen Spektren werden fiir T 4,2 R winkelabhangig. Mittels Simulation der bei T = 1,5 K gemessenen Spektren wird diese Winkelabhingigkeit erklart unter Benutzung des Spin-Hamiltonians fur einen vibronischen 2E-Grundzustand, der durch dynamischen E @ E Jahn-Teller-Effekt entsteht und unter Beriicksichtigung der inneren Spannungen.

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Electron Paramagnetic Resonance of Titanium in GaP

Cited by 15 publications

References 14 publications

Optical and Electrical Studies of GaP: Ti

Optical and Electrical Studies of GaP: Ti

Effects of uniaxial stress on the absorption lines of and the nature of the Jahn-Teller coupling

Electron Paramagnetic Resonance Study of the Dynamical Jahn‐Teller Effect on the 3d¹ Impurities Ti³⁺ and V⁴⁺ in GaP

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Electron Paramagnetic Resonance of Titanium in GaP

Cited by 15 publications

References 14 publications

Optical and Electrical Studies of GaP: Ti

Optical and Electrical Studies of GaP: Ti

Effects of uniaxial stress on the absorption lines of and the nature of the Jahn-Teller coupling

Electron Paramagnetic Resonance Study of the Dynamical Jahn‐Teller Effect on the 3d1 Impurities Ti3+ and V4+ in GaP

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Electron Paramagnetic Resonance Study of the Dynamical Jahn‐Teller Effect on the 3d¹ Impurities Ti³⁺ and V⁴⁺ in GaP