Probing the subband structure of a wide electron system in a parabolic quantum well via capacitance-voltage measurements

Anisotropic Magnetoresistance of Two-Dimensional Holes in GaAs

“…Then there is an inflection point followed by a reduction in The existence of the MR features around B * is intriguing. Similar, though sharper, features have been observed in in-plane B measurements in systems with multiple confinement subbands when a subband is depopulated [21]. We propose that the MR features observed in our data are related to the changes in the relative populations of the spin-subbands and the resulting changes in subband mobility and inter-subband scattering as the in-plane B is increased.…”

Highly anisotropic Zeeman splitting of two-dimensional hole systems

“…3 we have placed arrows between the two inflection points at a value of B we call B * . Similar, though sharper features have been observed in systems with several occupied confinement subbands when a subband is depopulated by means of an in-plane B [17]. We propose that the magnetoresistance feature at B * in Fig.…”

Compressibility of bilayer graphene

“…These type of jumps have been discussed earlier in the context of second-subband occupation in wide quantum wells (see for example Ref. 35 and references therein) and are potentially technologically interesting since they can in principle lead to bistability. We observe that the chemical potential jump implies a δ-function singularity in the compressibility κ at n = n 1 : this feature will be omitted in the presentation of compressibility numerical results below, Figs.…”