Concept of Force Variation Due to Charged Defects in Elemental and Compound Semiconductors

Green's function calculations of force variation due to charged impurities in elemental and compound semiconductors are analysed on the basis of simple physical arguments. It is strongly suggested that the trends of force variation may not be related with the long range Coulomb interactions, however, the important criteria should be the effect of electric field of charged impurity on its nearest neighbour bonds that mainly affects the short range couplings. Some new experimental results by i.r. method due to Si and Cl impurities in CdTe are also included that lend additional justification to the arguments. Rechnungen mittels Greenscher Funktion fur die Kraftanderung infolge geladener Storstellen in Element- und Verbindungshalbleitern werden auf der Grundlage von einfachen physikalischen Argumenten analysiert. Es wird angenommen, das die Trends der Kraftanderungen nicht mit langreichweitigen Coulombwechselwirkungen verknupft zu sein brauchen, das jedoch das wesentliche Kriterium der Einflus des elektrischen Feldes der geladenen Storstelle auf die Bindung seiner nachsten Nachbarn sein sollte, der hauptsachlich die kurzreichweitige Kopplung beeinflust. Einige neue experimentelle Ergebnisse durch IR-Methoden von Si- und Cl-Storstellen in CdTe werden ebenfalls angegeben, die eine zusatzliche Rechtfertigung fur die Argumente liefern.

[1]  D. Talwar,et al.  Lattice-dynamical study of impurity modes in mixed cuprous halides , 1979 .

[2]  M. Astles,et al.  Vibrational modes of silicon in indium phosphide , 1978 .

[3]  M. Vandevyver,et al.  Local force variations due to substitution impurities in nine compounds with the zinc-blende structure , 1978 .

[4]  D. Talwar,et al.  Far-IR lattice absorption spectra in ZnS:Be system , 1978 .

[5]  D. Talwar,et al.  Localized vibrational modes of isolated impurities in germanium , 1977 .

[6]  R. Triboulet CdTe And CdTe : Hg alloys crystal growth using stoichiometric and off-stoichiometric zone passing techniques , 1977 .

[7]  M. Vandevyver,et al.  Dynamique de reseau et frequences des modes de vibration pour des impuretes substitutionnelles dans InP, GaP et ZnS , 1977 .

[8]  M. Vandevyver,et al.  Lattice Dynamics of ZnTe and CdTe , 1976 .

[9]  D. Talwar,et al.  Local-mode frequencies due to substitutional impurities in zinc-blende-type crystals. II. Effect of force-constant changes , 1975 .

[10]  D. Talwar,et al.  Calculated far-infrared lattice absorption spectra of cadmium telluride doped with beryllium , 1974 .

[11]  A. Maradudin,et al.  Impurity vibrations of copper defect complexes in gallium arsenide crystals , 1972 .

[12]  W. Spitzer,et al.  Infrared Absorption of Lattice Modes and the Silicon Local Mode in GexSi1−x Alloys , 1971 .

[13]  John P. Walter,et al.  PSEUDOPOTENTIAL CALCULATIONS OF ELECTRONIC CHARGE DENSITIES IN SEVEN SEMICONDUCTORS , 1971 .

[14]  J. Vetelino,et al.  Localized mode frequency for substitutional impurities in zinc blende type crystals , 1971 .

[15]  E. Kellermann Theory of the vibrations of the sodium chloride lattice , 1940, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences.