CM & STAT.PHYS. SEMINAR - Thursday 9 May 2013

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CONDENSED MATTER AND STATISTICAL PHYSICS SECTION
SEMINAR ON DISORDER AND STRONG ELECTRON CORRELATIONS


Thursday, 9 May 2013  -   at 11:30 hrs.


Luigi Stasi Lecture Hall, Leonardo Building (1st floor)


Meera M. PARISH
London Centre for Nanotechnology, UCL, London, U.K.



Magnetotransport in Non-magnetic Inhomogeneous Materials


Abstract:
A substantial magnetodielectric effect is usually an indication
of coupled magnetic and elastic order, such as is found in the 
multiferroics. However, here I will show that magnetism is not necessary 
to produce either a magnetoresistance or a magneto-capacitance when the 
material is inhomogeneous.  From exact
calculations and numerical simulations of metal-dielectric
composites, I find a characteristic dielectric resonance that 
sensitively depends on magnetic field. I will discuss how this behaviour 
has already been observed experimentally in some
materials.