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Electron mobilities and photoluminescence of solution grown indiumphosphide single crystals
Solid State Communications,
Vol. 8,pp. i—vi, 1970.
Pergamon Press.
Printed in Great Britain
Abstracts of Articles to be Published in The Journal of Physics and Chemistry of Solids ‘J~Phys. Chem. Solids (to be published)’ should be cited in references to material quoted from this section prior to the publication of the relevant article.
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ELECTRON MOBILITIES AND PHOTOLUMINESCENCE OF SOLUTION GROWN INDIUMPHOSPHIDE SINGLE CRYSTAL S 0. Röder, U. Heim and M.H. Pilkuhn, Physikalisches Institut, Universität Frankfurt/M., Germany
InP single crystals were grown from an indium solution. They show a typical dendrite structure. The electron concentration ranges from 10 ~ to 1019 cm The dependence of the room temperature Hall mobility on the electron concentration is compared with the theoretical curves of Moore and Brooks-Herring. Photoluminescence spectra of relatively pure undoped samples show two major emission bands at low temperatures, one near 1.416 eV (containing four emission lines) and a band near 1.38 eV. Time resolved spectroscopy shows that the 1.38eV band is due to donor—acceptor pair recombination. At high doping levels the luminescence spectra show a pronounced Burstein—Moss shift to higher energies, the band-acceptor transition gains in relative intensity and broadens considerably. Above 1018 cm3 it is the only remaining emission band at low temperatures. The shift of the Fermi level with carrier concentration is compared with the theory assuming a parabolic conduction band. It is found, that the experimental shift does not follow quantitatively the expected Burstein—Moss shift, presumably due to band tailing and gap shrinkage effects.
A CALCULATION OF THE CONTRIBUTION OF QUASIPARTICLE ANISOTROPY TO THE ISOTROPIC KNIGHT SHIFT R.A. Craig, Department of Physics, Oregon State University, Corvallis, Oregon and Department of Physics, University of California at Riverside, Riverside, California
A model Fermi liquid-type calculation is performed to determine the contribution of anisotropy in the quasiparticle-quasiparticle interaction to the isotropic Knight shift. For reasonable values of the parameters of the theory, good agreement with the observed behavior of the Knight shift for small values of impurity concentration is obtained.
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Received 12 November 1969 Revised 5 January 1970
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CATIONIC TRANSPORT IN a-AgI AND a-Ag 2S C.M. Perrot, Department of Physics, University of New England, Armidale N.S.W., Australia
The high temperature (a) phases of silver iodide and silver sulphide are known to display marked deviation from the Einstein relation for cationic transport. An interpretation of this effect is suggested in terms of the cation disorder in the materials. It is also shown that, although a critical temperature for cation
Received 8 December 1969 Revised 9 February 1970
1
Vol. 8,pp. i—vi, 1970.
Pergamon Press.
Printed in Great Britain
Abstracts of Articles to be Published in The Journal of Physics and Chemistry of Solids ‘J~Phys. Chem. Solids (to be published)’ should be cited in references to material quoted from this section prior to the publication of the relevant article.
1.
2.
ELECTRON MOBILITIES AND PHOTOLUMINESCENCE OF SOLUTION GROWN INDIUMPHOSPHIDE SINGLE CRYSTAL S 0. Röder, U. Heim and M.H. Pilkuhn, Physikalisches Institut, Universität Frankfurt/M., Germany
InP single crystals were grown from an indium solution. They show a typical dendrite structure. The electron concentration ranges from 10 ~ to 1019 cm The dependence of the room temperature Hall mobility on the electron concentration is compared with the theoretical curves of Moore and Brooks-Herring. Photoluminescence spectra of relatively pure undoped samples show two major emission bands at low temperatures, one near 1.416 eV (containing four emission lines) and a band near 1.38 eV. Time resolved spectroscopy shows that the 1.38eV band is due to donor—acceptor pair recombination. At high doping levels the luminescence spectra show a pronounced Burstein—Moss shift to higher energies, the band-acceptor transition gains in relative intensity and broadens considerably. Above 1018 cm3 it is the only remaining emission band at low temperatures. The shift of the Fermi level with carrier concentration is compared with the theory assuming a parabolic conduction band. It is found, that the experimental shift does not follow quantitatively the expected Burstein—Moss shift, presumably due to band tailing and gap shrinkage effects.
A CALCULATION OF THE CONTRIBUTION OF QUASIPARTICLE ANISOTROPY TO THE ISOTROPIC KNIGHT SHIFT R.A. Craig, Department of Physics, Oregon State University, Corvallis, Oregon and Department of Physics, University of California at Riverside, Riverside, California
A model Fermi liquid-type calculation is performed to determine the contribution of anisotropy in the quasiparticle-quasiparticle interaction to the isotropic Knight shift. For reasonable values of the parameters of the theory, good agreement with the observed behavior of the Knight shift for small values of impurity concentration is obtained.
~.
Received 12 November 1969 Revised 5 January 1970
3.
CATIONIC TRANSPORT IN a-AgI AND a-Ag 2S C.M. Perrot, Department of Physics, University of New England, Armidale N.S.W., Australia
The high temperature (a) phases of silver iodide and silver sulphide are known to display marked deviation from the Einstein relation for cationic transport. An interpretation of this effect is suggested in terms of the cation disorder in the materials. It is also shown that, although a critical temperature for cation
Received 8 December 1969 Revised 9 February 1970
1