Dephasing Time of Two-Dimensional Holes in GaAs Open Quantum Dots (2006)
Faniel, S., Hackens, B., Vlad, A., Moldovan, L., Gustin, C., Habib, B., ...
We report magnetotransport measurements of two-dimensional holes in open quantum dots, patterned either as a single-dot or an array of dots, on a GaAs quantum well. For temperatures $T$ below 500 mK,...
Anomalous Spin Polarization of GaAs Two-Dimensional Hole Systems (2005)
Winkler, R., Tutuc, E., Papadakis, S. J., Melinte, S., Shayegan, M., Wasserman, D., ...
We report measurements and calculations of the spin-subband depopulation, induced by a parallel magnetic field, of dilute GaAs two-dimensional (2D) hole systems. The results reveal that the shape of...
Faniel, S., Tutuc, E., De Poortere, E. P., Gustin, C., Vlad, A., Melinte, S., ...
We report thermopower measurements of interacting GaAs bilayer hole systems. When the carrier densities in the two layers are equal, these systems exhibit a reentrant insulating phase near the...
Spin Splitting in GaAs (100) Two-Dimensional Holes (2004)
Habib, B., Tutuc, E., Melinte, S., Shayegan, M., Wasserman, D., Lyon, S. A., ...
We measured Shubnikov-de Haas (SdH) oscillations in GaAs (100) two-dimensional holes to determine the inversion asymmetry-induced spin splitting. The Fourier spectrum of the SdH oscillations contains...
Negative differential Rashba effect in two-dimensional hole systems (2004)
Habib, B., Tutuc, E., Melinte, S., Shayegan, M., Wasserman, D., Lyon, S. A., ...
We demonstrate experimentally and theoretically that two-dimensional (2D) heavy hole systems in single heterostructures exhibit a \emph{decrease} in spin-orbit interaction-induced spin splitting with...
Layer charge instability in unbalanced bilayer systems in the quantum Hall regime (2003)
Tutuc, E., Pillarisetty, R., Melinte, S., De Poortere, E. P., Shayegan, M.
Measurements in GaAs hole bilayers with unequal layer densities reveal a pronounced magneto-resistance hysteresis at the magnetic field positions where either the majority or minority layer is at...
Tutuc, E., Melinte, S., De Poortere, E. P., Shayegan, M., Winkler, R.
We report measurements and calculations of the spin-polarization, induced by a parallel magnetic field, of interacting, dilute, two-dimensional electron systems confined to GaAs/AlGaAs...
Role of density imbalance in an interacting bilayer hole system (2002)
Tutuc, E., Melinte, S., De Poortere, E. P., Pillarisetty, R., Shayegan, M.
We study interacting GaAs hole bilayers in the limit of zero tunneling. When the layers have equal densities, we observe a phase coherent bilayer quantum Hall (QH) state at total filling factor...
Spin polarization and g-factor of a dilute GaAs two-dimensional electron system (2001)
Tutuc, E., Melinte, S., Shayegan, M.
The effective g-factor ($g^{*}$) of a dilute interacting two-dimensional electron system is expected to increase with respect to its bare value as the density is lowered, and to eventually diverge as...
NMR determination of 2D electron spin polarization at ν=1/2 (2000)
Melinte, S., Freytag, N., Horvatić, M., Berthier, C., Lévy, L. P., Bayot, V., ...
NMR Determination of 2D Electron Spin Polarization at $\nu=1/2$ (1999)
Melinte, S., Freytag, N., Horvatic, M., Berthier, C., Levy, L. P., Bayot, V., ...
Using a `standard' NMR spin-echo technique we determined the spin polarization of two-dimensional electrons, confined to GaAs quantum wells, from the hyperfine shift of Ga nuclei in the wells....
Heat Capacity Evidence for the Suppression of Skyrmions at Large Zeeman Energy (1998)
Melinte, S., Grivei, E., Bayot, V., Shayegan, M.
Measurements on a multilayer two-dimensional electron system (2DES) near Landau level filling $\nu$=1 reveal the disappearance of the nuclear spin contribution to the heat capacity as the ratio...
Magnetization of an imcompressible two-dimensional electron gas. (1998)
Wiegers, S. A. J., Specht, M., Bibow, E. D., Lévy, L. P., Melinte, S., Grivei, E., ...
Bayot, V., Grivei, E., Melinte, S., Shayegan, M.
Thermal measurements on a GaAs/AlGaAs heterostructure reveal that the state of the confined two-dimensional electrons dramatically affects the nuclear-spin diffusion near Landau level filling factor...
Giant Low Temperature Heat Capacity of GaAs Quantum Wells near Landau Level Filling $\nu$=1 (1996)
Bayot, V., Grivei, E., Melinte, S., Santos, M. B., Shayegan, M.
We report low temperature ($T$) heat capacity ($C$) data on a multiple-quantum-well GaAs/AlGaAs sample in the quantum Hall regime. Relative to its low field magnitude, $C$ exhibits up to 10^5-fold...