National Research Council of Canada. Information and Communication Technologies
quantum Hall effect; resistively detected nuclear magnetic resonance (RDNMR); electronic domains; electronic spin polarization
The resistively detected nuclear magnetic resonance (RDNMR) performed on a two-dimensional electron gas is known to exhibit a peculiar 'dispersive' line shape at some filling factors, especially around $\nu =1$ . Here, we study in detail the inversion of the dispersive line shape as a function of the filling factor from $\nu =1$ to $2/3$ . The RDNMR spectra show a new characteristic W line shape in the longitudinal resistance, whereas dispersive lines detected in the Hall resistance remain unchanged. This W resonance, like the dispersive line, can be fitted correctly by a model of two independent response functions, which are the signatures of polarized and unpolarized electronic sub-systems.
Journal of Physics: Condensed Matter27, no. 27: 275801–.