Výsledky vyhledávání - "Wegener, L. A."

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Magnetic polarons and magnetoresistance in EuB6

Autor: Calderon, M. J., Wegener, L. G. L., Littlewood, P. B.

Publikováno v: Phys. Rev. B 70, 092408 (2004)

EuB6 is a low carrier density ferromagnet which exhibits large magnetoresistance, positive or negative depending on temperature. The formation of magnetic polarons just above the magnetic critical temperature has been suggested by spin-flip Raman sca

Externí odkaz: http://arxiv.org/abs/cond-mat/0312437

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Schrodinger equation with a spatially and temporally random potential: Effects of cross-phase modulation in optical communication

Autor: Green, A. G., Littlewood, P. B., Mitra, P. P., Wegener, L. G. L.

Publikováno v: Phys. Rev. E 66, 046627 (2002)

We model the effects of cross-phase modulation in frequency (or wavelength) division multiplexed optical communications systems, using a Schr\"odinger equation with a spatially and temporally random potential. Green's functions for the propagation of

Externí odkaz: http://arxiv.org/abs/physics/0210062

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Fluctuation induced hopping and spin polaron transport

Autor: Wegener, L. G. L., Littlewood, P. B.

We study the motion of free magnetic polarons in a paramagnetic background of fluctuating local moments. The polaron can tunnel only to nearby regions of local moments when these fluctuate into alignment. We propose this fluctuation induced hopping a

Externí odkaz: http://arxiv.org/abs/cond-mat/0112385

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