Infrared absorption of indium antimonide

Eugene Blount, Joseph Callaway, Morrel Cohen, William Dumke, James Phillips

Infrared absorption in InSb near the absorption edge has been interpreted as the superposition of two indirect transitions requiring phonons of 100°and 30°, the former transition involving the smaller electronic energy gap. The first transition is consistent with a band scheme having electrons at the center of the zone and holes either at the corner of the zone or about halfway along the [1,1,1] line. The other transition may indicate a second hole with an energy gap about 0.025 ev larger than that of the first. © 1956 The American Physical Society.

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Materials
Curve 1
Temperature K: 5 Wavelength Range, µm: 5.44-16.1 Geometry θ θ' ω': ~0° ~0° Composition (weight percent), Specifications and Remarks: p-type crystallite; hole concentration 9 x 10¹⁶ cm⁻³.
Curve 2
Temperature K: 80 Wavelength Range, µm: 5.48-24.9 Geometry θ θ' ω': ~0° ~0° Composition (weight percent), Specifications and Remarks: Above specimen and conditions.
Curve 3
Temperature K: 150 Wavelength Range, µm: 8.07-29.6 Geometry θ θ' ω': ~0° ~0° Composition (weight percent), Specifications and Remarks: Above specimen and conditions.
Curve 4
Temperature K: 300 Wavelength Range, µm: 7.21-31.9 Geometry θ θ' ω': ~0° ~0° Composition (weight percent), Specifications and Remarks: Above specimen and conditions.
Curve 5
Temperature K: 115 Wavelength Range, µm: 5.75-24.6 Geometry θ θ' ω': ~0° ~0° Composition (weight percent), Specifications and Remarks: n-type; large crystallite; carrier concentration 10¹⁴ cm⁻³.
Curve 6
Temperature K: 170 Wavelength Range, µm: 6.37-24.7 Geometry θ θ' ω': ~0° ~0° Composition (weight percent), Specifications and Remarks: Above specimen and conditions.
Curve 7
Temperature K: 300 Wavelength Range, µm: 7.40-24.5 Geometry θ θ' ω': ~0° ~0° Composition (weight percent), Specifications and Remarks: Above specimen and conditions.