Abstract
AbstractThe doping dependence of the resonant interband Faraday rotation (IFR) in germanium shows a screening influence of free carriers. This proves that the IFR is due to transitions in exciton states split up by spin and not to transitions between Landau levels. At the critical doping concentration the Debye radius is equal to the Bohr radius of the excitons. A second transition energy in connection with a greater exciton radius must be interpreted as an indication of excitons with smaller reduced mass (“light excitons”). The measurements embrace a concentration range of 5 × 1013 to 6 × 1017 cm−3 and are carried out at 297 K and 2 T on single crystals. The interpretation in terms of excitons is supported by the optical isotropy of the IFR observed in intrinsic Ge.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
