Piot, B. A., Maude, D. K., Gennser, U., Cavanna, A., Mailly, D.
The magnetoresistance of a low carrier density, disordered GaAs based two-dimensional (2D) electron gas has been measured in parallel magnetic fields up to 32 T. The feature in the resistance...
Wigner Crystallization in a Quasi-3D Electronic System (2009)
Piot, B. A., Jiang, Z., Dean, C. R., Engel, L. W., Gervais, G., Pfeiffer, L. N., ...
When a strong magnetic field is applied perpendicularly (along z) to a sheet confining electrons to two dimensions (x-y), highly correlated states emerge as a result of the interplay between...
Current-induced nuclear-spin activation in a two-dimensional electron gas (2009)
Dean, C. R., Piot, B. A., Gervais, G., Pfeiffer, L. N., West, K. W.
Electrically detected nuclear magnetic resonance was studied in detail in a two-dimensional electron gas as a function of current bias and temperature. We show that applying a relatively modest...
Contrasting Behavior of the 5/2 and 7/3 Fractional Quantum Hall Effect in a Tilted Field (2008)
Dean, C. R., Piot, B. A., Hayden, P., Sarma, S. Das, Gervais, G., Pfeiffer, L. N., ...
Using a tilted field geometry, the effect of an in-plane magnetic field on the even denominator nu = 5/2 fractional quantum Hall state is studied. The energy gap of the nu = 5/2 state is found to...
Intrinsic Gap of the nu=5/2 Fractional Quantum Hall State (2008)
Dean, C. R., Piot, B. A., Hayden, P., Sarma, S. Das, Gervais, G., Pfeiffer, L. N., ...
The fractional quantum Hall effect is observed at low field, in a regime where the cyclotron energy is smaller than the Coulomb interaction. The nu=5/2 excitation gap is measured to be 262+/-15 mK at...
Dean, C. R., Piot, B. A., Pfeiffer, L. N., West, K. W., Gervais, G.
A study of the resistively detected nuclear magnetic resonance (RDNMR) lineshape in the vicinity of $\nu=1$ was performed on a high-mobility 2D electron gas formed in GaAs/AlGaAs. In higher Landau...
Piot, B. A., Maude, D. K., Henini, M., Wasilewski, Z. R., Gupta, J. A., Friedland, K. J., ...
In a recent paper [B. A. Piot et al., Phys. Rev. B 72, 245325 (2005)], we have shown that the lifting of the electron spin degeneracy in the integer quantum Hall effect at high filling factors should...
Integer quantum Hall effect in a PbTe quantum well (2006)
Chitta, V. A., Desrat, W., Maude, D. K., Piot, B. A., Oliveira, N. F., Rappl, P. H. O., ...
Transport measurements have been carried out on a 10 nm n-type PbTe/Pb0.9Eu0.1Te quantum well at millikelvin temperatures. The Hall and longitudinal resistances are measured in a Van der Pauw...
Piot, B. A., Maude, D. K., Henini, M., Wasilewski, Z. R., Friedland, K. J., Hey, R., ...
Spin splitting in the integer quantum Hall effect is investigated for a series of Al$_{x}$Ga$_{1-x}$As/GaAs heterojunctions and quantum wells. Magnetoresistance measurements are performed at mK...
Quantum Hall ferromagnet at high filling factors: A magnetic-field-induced Stoner transition (2005)
Piot, B. A., Maude, D. K., Henini, M., Wasilewski, Z. R., Friedland, K. J., Hey, R., ...