TY - JOUR
T1 - Optical spectroscopy of magnetic 2D electron gases at the Los Alamos pulsed magnetic field facility
AU - Crooker, S. A.
AU - Rickel, D. G.
AU - Johnston-Halperin, E.
AU - Awschalom, D. D.
AU - Knobel, R.
AU - Samarth, N.
AU - Lyo, S. K.
AU - Efros, A.
N1 - Funding Information:
S.A.C. would like to especially thank J. Schillig, M. Gordon, and M. Pacheco for their help and expertise. Experiments performed at the National High Magnetic Field Laboratory are supported by the US National Science Foundation through Cooperative Grant No. DMR 9016241, the State of Florida, and the US Department of Energy.
PY - 2001/4
Y1 - 2001/4
N2 - A brief overview of the magnet technologies at the pulsed field facility at Los Alamos is presented, focusing on the experimental capabilities made possible by the unique generator-driven 60 T long-pulse magnet. Optical spectroscopy is one such beneficiary, and recent measurements of semiconductor systems are discussed, including studies of magnetic-disorder annealing in diluted magnetic semiconductors, "dark" excitons in CdSe quantum dots, and in particular, studies of negatively-charged exciton states in magnetic 2D electron gases. Here, the huge Zeeman energy inherent in these magnetically-doped II-VI materials results in a completely spin-polarized electron gas (even at low magnetic fields), and drives an apparent instability of the singlet (spin antiparallel) electrons that are bound to the photohole.
AB - A brief overview of the magnet technologies at the pulsed field facility at Los Alamos is presented, focusing on the experimental capabilities made possible by the unique generator-driven 60 T long-pulse magnet. Optical spectroscopy is one such beneficiary, and recent measurements of semiconductor systems are discussed, including studies of magnetic-disorder annealing in diluted magnetic semiconductors, "dark" excitons in CdSe quantum dots, and in particular, studies of negatively-charged exciton states in magnetic 2D electron gases. Here, the huge Zeeman energy inherent in these magnetically-doped II-VI materials results in a completely spin-polarized electron gas (even at low magnetic fields), and drives an apparent instability of the singlet (spin antiparallel) electrons that are bound to the photohole.
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U2 - 10.1016/S0921-4526(01)00345-3
DO - 10.1016/S0921-4526(01)00345-3
M3 - Article
AN - SCOPUS:0035304729
SN - 0921-4526
VL - 298
SP - 369
EP - 375
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
IS - 1-4
ER -