Composite fermion states around the two-dimensional hole Landau level filling factor 3/2 in tilted magnetic fields

Transport measurements under tilted magnetic fields were performed on a series of C-doped (001) GaAs/AlGaAs two-dimensional hole quantum wells. Due to a large g factor, Zeeman energy is large and comparable to the cyclotron energy in these samples. On the other hand, it was found that the in-plane component g(parallel to) is small, and the effect of a tilted magnetic field is mainly to increase the effective mass of the holes. We investigate the spin transition of composite fermion states around Landau level (LL) filling factor 3/2. We found that the nu = 4/3 state encounters a partial-to full-spin-polarization transition, conforming to the same pattern as that of electron samples. In addition, a high-resistance phase emerges at nu = 3/2 under very high tilt angles. We interpret both of these phenomena as a consequence of LL crossing under a purely perpendicular magnetic field.National Basic Research Program of China [2012CB921301, 2014CB920901]; NSF [DMR-1508644]; Welch Foundation [C-1682]; Gordon and Betty Moore Foundation; National Science Foundation MRSEC Program through the Princeton Center [DMR-0819860]; National Science Foundation [DMR-1157490]; State of FloridaSCI(E)ARTICLE159