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Antiferromagnetism in CaCuTiO studied by magnetic Raman spectroscopy
A. Koitzsch, G. Blumberg, A. Gozar +4
For CaCuTiO -- an insulator that exhibits a giant dielectric response above 100 K -- Cu antiferromagnetic spin ordering has been investigated by magnetic…
The metallic resistance of a dilute two-dimensional hole gas in a GaAs quantum well: two-phase separation at finite temperature?
Xuan P. A. Gao, Allen P. Mills, Arthur P. Ramirez +2
We have studied the magnetotransport properties of a high mobility two-dimensional hole gas (2DHG) system in a 10nm GaAs quantum well (QW) with densities in range of 0.7-1.6*10^10…
Two-dimensional metal in a parallel magnetic field
Xuan P. A. Gao, Allen P. Mills, Arthur P. Ramirez +2
We have investigated the effect of an in plane parallel magnetic field (B_||) on two high mobility metallic-like dilute two-dimensional hole gas (2DHG) systems in GaAs quantum well…
The suppression of superconductivity in MgCNi3 by Ni-site doping
M. A. Hayward, M. K. Haas, A. P. Ramirez +5
The effects of partial substitution of Cu and Co for Ni in the intermetallic perovskite superconductor MgCNi3 are reported. Calculation of the expected electronic density of states…
Suppression of weak localization effects in low-density metallic 2D holes
A. P. Mills, A. P. Ramirez, X. P. A. Gao +3
We have measured the conductivity in a gated high-mobility GaAs two dimensional hole sample with densities in the range (7-17)x10^9 cm^-2 and at hole temperatures down to 5x10^-3 E…