Crystal growth and neutron studies of large single crystals of the alloy series SnTe-GeTe

Lefkowitz, I.; Shields, M.; Dolling, G.

doi:10.1016/0022-0248(70)90032-1

Cited by 9 publications

References 4 publications

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Twining faults in epitaxial films of germanium telluride and GeTeSnTe alloys

Stoëmenos

Vincent

1972

Phys. Stat. Sol. (a)

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Films of rhombohedral GeTe and GeTexSnTe1−x alloys grown on KCl, although apparently single‐crystal, contain a very high defect density. Various annealing techniques can be used to grow relatively large single‐crystal areas, separated by twin boundaries on {110} and {100} planes. Measurements of diffraction patterns from twinned areas are used to plot the rhombohedral angle, α, as a function of alloy composition. There is no evidence for the existence of a metastable cubic phase for x > 0.5. Extra reflections with fractional Miller indices are interpreted as a new structural phase with hexagonal symmetry.

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Twining faults in epitaxial films of germanium telluride and GeTeSnTe alloys

Stoëmenos

Vincent

1972

Phys. Stat. Sol. (a)

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Optical Properties of the Alloy System SnTeGeTe from Reflectance Measurements

Lewis

1987

Physica Status Solidi (b)

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The reflectance spectra of bulk samples of the alloy series Snl-,Ge,Te are measured a t room temperature in the wavelength range 0.2 to 60 pm. The principal optical constants are obtained using Kramers-Kronig analysis. The variations of the optical dielectric constant, the carrier effective mass, the optical mobility, and the optical energy gap are given as functions of the alloy fraction x. For the Sn-rich alloys (z< 0.3) the energy gap and the dielectric constant do not follow the trends established for the series at the Ge-rich side, and are possibly related to the cubic-rhombohedra1 phase transition that occurs in this system. The mobility and effective mass, though, behave reasonably for all alloy fractions.On a mesure les spectres de rbflexion des Cchantillons en gros du systhme d'alliage Snl-,Ge,To 8. l'ambiante dans la gamme des ondee 0,2 8. 50 pm. Les constantes optiques principales ont BtB obtenues en utilisant l'analyse Kramers-Kronig. Les variations dc la constante diblectrique optique, la masse effective des porteurs, la mobilitk optique, et 1'6cart knergetique optique sont presentees en fonction de la composition d'alliage 2. Pour les alliages riches en Sn (x < 0,3) l'ecart Bnergetique et la constante dielectrique ne suivent pas l'alluro Btablie pour la serie par les compos6s riches en Ge, un comportement peut-btre lie 8. la transition de phase cubique-rhombohedrale qui se montre dans ce syst8me. La mobilite et la masse effective, d'ailleurs, se comportent normalement pour toutes compositions d'alliage.

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