Abstract

Transmission measurements in the nonsaturated or Urbach’s region were done from room temperature up to 853 K. A strong change in reflectivity with temperature is reported.

© 1978 Optical Society of America

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References

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  1. D. Redfield and W. J. Burke, Phys. Rev. B 6, 3104 (1972).
    [Crossref]
  2. D. Redfield and W. J. Burke, Bull. Am. Phys. Soc. 15, 394 (1970).
  3. M. Capizzi and A. Frova, Phys. Rev. Lett. 25, 1298 (1970).
    [Crossref]
  4. M. I. Cohen and R. F. Blunt, Phys. Rev. 168, 929 (1968).
    [Crossref]
  5. M. Capizzi and A. Frova, Nuovo Cimento B 5, 181 (1971).
    [Crossref]
  6. For a review and theory see, J. D. Dow and D. Redfield, Phys. Rev. B 5, 594 (1972).
    [Crossref]
  7. R. Comes, M. Lambert, and A. Guinier, Solid State Commun. 6, 715 (1968).
    [Crossref]
  8. M. P. Fontana and M. Lambert, Solid State Commun. 10, 1 (1972).
    [Crossref]
  9. G. A. Barbosa, A. Chaves, and S. P. S. Porto, Solid State Commun. 11, 1053 (1972).
    [Crossref]
  10. A. M. Quittet and M. Lambert, Solid State Commun. 12, 1053 (1973).
    [Crossref]
  11. T. Wolfram, Phys. Rev. Lett. 29, 1383 (1972).
    [Crossref]
  12. M. Cardona, Phys. Rev. 140, A651 (1965).
    [Crossref]

1973 (1)

A. M. Quittet and M. Lambert, Solid State Commun. 12, 1053 (1973).
[Crossref]

1972 (5)

T. Wolfram, Phys. Rev. Lett. 29, 1383 (1972).
[Crossref]

D. Redfield and W. J. Burke, Phys. Rev. B 6, 3104 (1972).
[Crossref]

For a review and theory see, J. D. Dow and D. Redfield, Phys. Rev. B 5, 594 (1972).
[Crossref]

M. P. Fontana and M. Lambert, Solid State Commun. 10, 1 (1972).
[Crossref]

G. A. Barbosa, A. Chaves, and S. P. S. Porto, Solid State Commun. 11, 1053 (1972).
[Crossref]

1971 (1)

M. Capizzi and A. Frova, Nuovo Cimento B 5, 181 (1971).
[Crossref]

1970 (2)

D. Redfield and W. J. Burke, Bull. Am. Phys. Soc. 15, 394 (1970).

M. Capizzi and A. Frova, Phys. Rev. Lett. 25, 1298 (1970).
[Crossref]

1968 (2)

M. I. Cohen and R. F. Blunt, Phys. Rev. 168, 929 (1968).
[Crossref]

R. Comes, M. Lambert, and A. Guinier, Solid State Commun. 6, 715 (1968).
[Crossref]

1965 (1)

M. Cardona, Phys. Rev. 140, A651 (1965).
[Crossref]

Barbosa, G. A.

G. A. Barbosa, A. Chaves, and S. P. S. Porto, Solid State Commun. 11, 1053 (1972).
[Crossref]

Blunt, R. F.

M. I. Cohen and R. F. Blunt, Phys. Rev. 168, 929 (1968).
[Crossref]

Burke, W. J.

D. Redfield and W. J. Burke, Phys. Rev. B 6, 3104 (1972).
[Crossref]

D. Redfield and W. J. Burke, Bull. Am. Phys. Soc. 15, 394 (1970).

Capizzi, M.

M. Capizzi and A. Frova, Nuovo Cimento B 5, 181 (1971).
[Crossref]

M. Capizzi and A. Frova, Phys. Rev. Lett. 25, 1298 (1970).
[Crossref]

Cardona, M.

M. Cardona, Phys. Rev. 140, A651 (1965).
[Crossref]

Chaves, A.

G. A. Barbosa, A. Chaves, and S. P. S. Porto, Solid State Commun. 11, 1053 (1972).
[Crossref]

Cohen, M. I.

M. I. Cohen and R. F. Blunt, Phys. Rev. 168, 929 (1968).
[Crossref]

Comes, R.

R. Comes, M. Lambert, and A. Guinier, Solid State Commun. 6, 715 (1968).
[Crossref]

Dow, J. D.

For a review and theory see, J. D. Dow and D. Redfield, Phys. Rev. B 5, 594 (1972).
[Crossref]

Fontana, M. P.

M. P. Fontana and M. Lambert, Solid State Commun. 10, 1 (1972).
[Crossref]

Frova, A.

M. Capizzi and A. Frova, Nuovo Cimento B 5, 181 (1971).
[Crossref]

M. Capizzi and A. Frova, Phys. Rev. Lett. 25, 1298 (1970).
[Crossref]

Guinier, A.

R. Comes, M. Lambert, and A. Guinier, Solid State Commun. 6, 715 (1968).
[Crossref]

Lambert, M.

A. M. Quittet and M. Lambert, Solid State Commun. 12, 1053 (1973).
[Crossref]

M. P. Fontana and M. Lambert, Solid State Commun. 10, 1 (1972).
[Crossref]

R. Comes, M. Lambert, and A. Guinier, Solid State Commun. 6, 715 (1968).
[Crossref]

Porto, S. P. S.

G. A. Barbosa, A. Chaves, and S. P. S. Porto, Solid State Commun. 11, 1053 (1972).
[Crossref]

Quittet, A. M.

A. M. Quittet and M. Lambert, Solid State Commun. 12, 1053 (1973).
[Crossref]

Redfield, D.

For a review and theory see, J. D. Dow and D. Redfield, Phys. Rev. B 5, 594 (1972).
[Crossref]

D. Redfield and W. J. Burke, Phys. Rev. B 6, 3104 (1972).
[Crossref]

D. Redfield and W. J. Burke, Bull. Am. Phys. Soc. 15, 394 (1970).

Wolfram, T.

T. Wolfram, Phys. Rev. Lett. 29, 1383 (1972).
[Crossref]

Bull. Am. Phys. Soc. (1)

D. Redfield and W. J. Burke, Bull. Am. Phys. Soc. 15, 394 (1970).

Nuovo Cimento B (1)

M. Capizzi and A. Frova, Nuovo Cimento B 5, 181 (1971).
[Crossref]

Phys. Rev. (2)

M. I. Cohen and R. F. Blunt, Phys. Rev. 168, 929 (1968).
[Crossref]

M. Cardona, Phys. Rev. 140, A651 (1965).
[Crossref]

Phys. Rev. B (2)

D. Redfield and W. J. Burke, Phys. Rev. B 6, 3104 (1972).
[Crossref]

For a review and theory see, J. D. Dow and D. Redfield, Phys. Rev. B 5, 594 (1972).
[Crossref]

Phys. Rev. Lett. (2)

M. Capizzi and A. Frova, Phys. Rev. Lett. 25, 1298 (1970).
[Crossref]

T. Wolfram, Phys. Rev. Lett. 29, 1383 (1972).
[Crossref]

Solid State Commun. (4)

R. Comes, M. Lambert, and A. Guinier, Solid State Commun. 6, 715 (1968).
[Crossref]

M. P. Fontana and M. Lambert, Solid State Commun. 10, 1 (1972).
[Crossref]

G. A. Barbosa, A. Chaves, and S. P. S. Porto, Solid State Commun. 11, 1053 (1972).
[Crossref]

A. M. Quittet and M. Lambert, Solid State Commun. 12, 1053 (1973).
[Crossref]

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Figures (8)

FIG. 1
FIG. 1

Experimental setup for absorption studies.

FIG. 2
FIG. 2

Absorption coefficient as a function of energy and temperature.

FIG. 3
FIG. 3

Transmitted intensity. Sample thickness = 0.312 mm.

FIG. 4
FIG. 4

Transmitted intensity. Sample thickness = 0.732 mm.

FIG. 5
FIG. 5

Transmitted intensity. Sample thickness = 1.60 mm.

FIG. 6
FIG. 6

σ as a function of temperature.

FIG. 7
FIG. 7

InA as a function of temperature.

FIG. 8
FIG. 8

Reflectivity as a function of energy and temperature.

Tables (1)

Tables Icon

TABLE I Temperature variation of parameter Eg.

Equations (2)

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α = α 0 e σ ( h ω - E g ) / K T ,
I i / I 0 = [ ( 1 - R ) 2 e - α x i ] / [ 1 - R 2 e - 2 α x i ] ,