Seminar on Disorder and strong electron correlations: “Magnetotransport in Non-magnetic Inhomogeneous Materials”
Starts 9 May 2013 12:30
Ends 9 May 2013 20:00
Central European Time
Leonardo da Vinci Building Luigi Stasi Seminar Room
Strada Costiera, 11
I - 34151 Trieste (Italy)
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 magnetocapacitance 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.