Abstract
Magnetotransport experiments on several n-type Hg1−xZnxTe-CdTe superlattices reveal the existence of two species of charge carriers which dominate in low and in high magnetic fields. These superlattices exhibit low-magnetic-field Shubnikov–de Haas oscillations and Hall plateaus in one superlattice. They also exhibit a metal-insulator transition due to an energy gap induced by the high magnetic fields. The induced energy gap is estimated using a simplified parallel-conduction model. When most of the electrons in the superlattices have been magnetically frozen out, a second species of charge carriers starts dominating the charge transport. The second species of charge carriers shows large amplitude Shubnikov–de Haas oscillations and Hall plateaus. The standard determination of effective masses, mobilities, and carrier densities from the Shubnikov–de Haas oscillations in low and in high magnetic fields also confirms the presence of two species of charge carriers of different origin. It is proposed that the high-magnetic-field Shubnikov–de Haas oscillations are due to electrons residing at the buffer-superlattice interface on the superlattice side.
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.
