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41 papers · 2 filters
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…
Conditions for the importance of inelastic losses in photoemission
Robert Haslinger, Robert Joynt
It is shown that for materials near the metal insulator transition, inelastic losses can give rise to substantial changes on a scale of 10-100 meV in the observed lineshape compare…
Binding Energy of Charged Excitons in ZnSe-based Quantum Wells
G. V. Astakhov, D. R. Yakovlev, V. P. Kochereshko +9
Excitons and charged excitons (trions) are investigated in ZnSe-based quantum well structures with (Zn,Be,Mg)Se and (Zn,Mg)(S,Se) barriers by means of magneto-optical spectroscopy.…
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…
Dynamics of a single electron in the disordered Holstein model
F. X. Bronold, A. Saxena, A. R. Bishop
We study, at zero temperature, the dynamics of a single electron in a Holstein model augmented by site-diagonal, binary-alloy type disorder. The average over the phonon vacuum and…
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…