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- Centre National de la Recherche ScientifiqueFR31 papers
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7 papers · 1 filter
Coherence properties of the microcavity polariton condensate
D. M. Whittaker, P. R. Eastham
A theoretical model is presented which explains the dominant decoherence process in a microcavity polariton condensate. The mechanism which is invoked is the effect of self-phase m…
Magnetic Circular Dichroism spectroscopy in epitaxial La0.7Sr0.3MnO3 thin films
T. K. Nath, J. R. Neal, G. A. Gehring
Magneto optic measurements are a very powerful tool for investigating the polarization of a conduction band as a function of temperature and are used here to study the polarization…
Determination of the single-ion anisotropy energy in a S = 5/2 kagome antiferromagnet using X-ray absorption spectroscopy
M. A. de Vries, T. K. Johal, A. Mirone +5
We report x-ray absorption and x-ray linear dichroism measurements at the Fe L2,3 edges of the geometrically frustrated systems of potassium and hydronium iron jarosite. Comparison…
Pressure Induced Quantum Phase Transitions
G. A. Gehring
A quantum critical point is approached by applying pressure in a number of magnetic metals. The observed dependence of Tc on pressure necessarily means that the magnetic energy is…
A Potts model for the distortion transition in LaMnO
Mahrous R. Ahmed, G. A. Gehring
The Jahn-Teller distortive transition of \lmo is described by a modified 3-state Potts model. The interactions between the three possible orbits depends both on the orbits and thei…
Carrier-induced ferromagnetism in n-type ZnMnAlO and ZnCoAlO thin films at room temperature
XH Xu, AJ Behan, M Ziese +6
The realization of semiconductors that are ferromagnetic above room temperature will potentially lead to a new generation of spintronic devices with revolutionary electrical and op…