Phys. Rev. Lett. 29, 772–775 (1972)Dominant Second-Order Dipole-Moment Contribution in the Infrared Absorption of III-V CompoundsReceived 22 May 1972; published in the issue dated 18 September 1972 It is shown that a relationship exists between the coefficient describing the infrared lattice absorption and the ionic contribution to the second-order electric susceptibility in a polar noncentrosymmetric crystal. By analyzing the available data of the latter it is concluded that two-phonon sidebands in the infrared absorption are due to the second-order dipole moment in all the III-V compounds and to the third-order potential in ZnO and CdS. Further, the magnitude of the integrated infrared absorption coefficient in a cubic homopolar IV-IV semiconductor is discussed. © 1972 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.29.772
DOI:
10.1103/PhysRevLett.29.772
PACS:
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.