Abstract
We report measurements of the Hall effect in $1000--4000\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}}$ wide ${\mathrm{Al}}_{x}{\mathrm{Ga}}_{x\ensuremath{-}1}\mathrm{As}$ parabolic wells with quasi-two-dimensional electrons and holes in a perpendicular magnetic field. Above a critical magnetic field $Bg3T$, the Hall resistance for wide parabolic wells is found to be enhanced when the temperature decreases. We attribute this enhanced Hall slope to a carrier density effect. The Hartree and exchange-correlation terms produce a strong variation of the potential-well shape. The width of the electronic and hole slabs shrinks as the magnetic field is increased, which leads to the redistribution of the charge between the well and impurity layer.
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.
