Skip to main content Accessibility help
×
Home

Amorphous/Crystalline Structure And Phase Transformations In Metastable Semiconducting Ge1−xSnx

  • Susanne M. Lee (a1) and Katayun Barmak (a2)

Abstract

The semiconducting crystalline alloys, Ge1−xSnx, are of interest due to theoretical predictions about their electronic band structures which make them useful in infrared photodetectors. However the composition region where these alloys have the desired properties is greater than the equilibrium solid solubility limit of Sn in Ge (x<0.01). We have circumvented the solubility limits and produced thin (2000Å) and thick (4–8Μm) films of Gei.xSnx (x<0.31) by rf sputtering. Differential scanning calorimetry (DSC) Measurements were performed to study grain growth and crystallization processes in these highly metastable semiconductors. X-ray and electron diffraction measurements indicated the materials were amorphous, but the fact that some of the films were fine grained polycrystalline samples only became apparent in their DSC spectra. We present models that describe quantitatively the transformation behavior in both sets of films.

Copyright

References

Hide All
1 Lee, S.M., J. Appl. Phys., publication date:l Feb 1994.
2 Chen, L. C and Spaepen, F., J. Appl. Phys. 69, 679 (1991).
3 Atkinson, H.V., Acta Metall. 36, 469 (1988).
4 Eyring, H., J.Chem.Phys. 3, 107 (1935).
5 Wert, C. A., Phys. Rev. 79, 601 (1950).
6 Ridgway, M. C, Elliman, R. G., Thornton, R. P., Williams, J. S., Appl. Phys. Lett. 56, 1992 (1990);
Smith, D. A., Tu, K. N., Wiess, B. Z., Ultramicroscopy 30, 90 (1989);
Hewett, C. A., Suni, I., Lau, S. S., Hung, L. S., and Scott, D. M., Mat. Res. Soc. Symp. Proc. 27, 145 (1984). 7 Chen and Spaepen, op. cit., 679.
8 Murr, L. E., Interfacial Phenomena in metals and Alloys. (Addison-Wesley, London, 1975).
9 Burke, J. E. and Turnbull, D., Prog. Metal Phys. 3, 220 (1952);
Wagner, C, Elektrochem, Z.. 65, 581 (1961);
Thompson, C. V., Frost, H. J., and Spaepen, F., Acta Metall. 35, 887 (1987).

Amorphous/Crystalline Structure And Phase Transformations In Metastable Semiconducting Ge1−xSnx

  • Susanne M. Lee (a1) and Katayun Barmak (a2)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed