What is Gap: Definition and 288 Discussions

Gallium phosphide (GaP), a phosphide of gallium, is a compound semiconductor material with an indirect band gap of 2.24 eV at room temperature. Impure polycrystalline material has the appearance of pale orange or grayish pieces. Undoped single crystals are orange, but strongly doped wafers appear darker due to free-carrier absorption. It is odorless and insoluble in water.
GaP has a microhardness of 9450 N/mm2, a Debye temperature of 446 K (173 °C), and a thermal expansion coefficient of 5.3 ×10−6 K−1 at room temperature. Sulfur, silicon or tellurium are used as dopants to produce n-type semiconductors. Zinc is used as a dopant for the p-type semiconductor.
Gallium phosphide has applications in optical systems. Its static dielectric constant is 11.1 at room temperature. Its refractive index varies between ~3.2 and 5.0 across the visible range, which is higher than in most other semiconducting materials.

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  1. B

    Finding Gap Between Two Objects on Moving Conveyor

    I am needing to find the gap between two pieces of wood on a conveyor belt. I am new t this and am having trouble knowing what to Google to find the right formulas. I found one answer on here that helped a little, but it was dealing with two conveyors, and I am not sure if I adjusted the formula...
  2. L

    Admissions Academics gap: Looking for 2nd M.Sc Physics degree or a PhD Physics?

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  3. MevsEinstein

    I Defining the Prime Gap function

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  4. godiswatching_

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  5. F

    I Gap between introductory physics & solid state physics?

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  6. BalinesePhysicist

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  7. yecko

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  8. M

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  9. R

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  10. T

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  11. Rzbs

    I Importance of the energy gap in electronic transport properties

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  12. T

    How to Measure and Calculate Band Gap of a Photovoltaic Device

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  13. J

    Modeling Uniform Field Gap Electrodes, Rogowski or others

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  14. J

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  15. Amitkumarr

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  16. Jehannum

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  17. jisbon

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  18. S

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  19. R

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  20. J

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  21. A

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  22. E

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  23. Alex Karatzky

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  24. Alex Karatzky

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  25. G

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  26. Cerenkov

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  27. FlyingPhysicist

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  28. N

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  30. G

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  32. T

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  33. J

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  34. Y

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  35. Alettix

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  36. S

    Energy Gap of 2 states in a deep rectangular potential well.

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  37. F

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  38. alex1515

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  39. G

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  40. G

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  41. E

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  42. J

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  43. LLT71

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  44. L

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  45. N

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  46. T

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  47. G

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  48. peroAlex

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  49. Sachin Desarada

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  50. V

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