magnetic-materials-2018-scientifictracks

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S e p t e m b e r 2 4 - 2 6 , 2 0 1 8 | B u d a p e s t , H u n g a r y

OF EXCELLENCE

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YEARS

Magnetic Materials 2018

Materials Science and Nanotechnology

Volume 2

MAGNETISM AND

MAGNETIC MATERIALS

International Conference on

Jonas Fransson, Mater Sci Nanotechnol 2018, Volume 2

MAGNETIC NON-EQUILIBRIUM CONTROL

OF HEAT AND CHARGE TRANSPORT IN

PARAMAGNETIC MOLECULAR DIMER

Jonas Fransson

Uppsala University, Sweden

tilizing the possibility to electrically and thermally control the magnetic

exchange, interactions between localized magnetic moments, we here

present results regarding the charge and heat transport properties in dimer

comparing, for example, paramagnetic molecules. We consider both charge

and heat, transport under non-equilibrium conditions imposed using voltage

bias and temperature difference across the junction. Generic properties for

bothtransportquantitiesarereducedcurrentsinthemagneticallyactiveregime

compared to the inactive, or, paramagnetic, and efficient current blockade in

the anti-ferromagnetic regime. In contrast, while the charge current is about

an order of magnitude larger in the ferromagnetic regime, compared to the

anti-ferromagnetic, the heat current is efficiently blockaded there as well.

This disparate behavior of the heat current is attributed to current resonances

in the ferromagnetic regime which counteract the normal heat flow. It can

also be noted that the temperature difference has a strongly reducing effect

of the exchange interaction, which tends to destroy the magnetic control of

the transport proper-ties. The upside of the weakened exchange interaction is

a possibility to tune the system into thermal rectification, for both the charge

and heat currents.

Jonas Fransson has completed his PhD in Physics

in 2002, at Uppsala University, Uppsala, Sweden, and

postdoctoral studies fromThe Royal Institute of Tech-

nology, Stockholm, Sweden, and Los Alamos Natl.

Lab., Los Alamos, NM, USA. He is Professor in Physics

at Uppsala University since 2015. He has published

more than 80 papers in reputed journals and written

the text book “Non-Equilibrium Nano-Physics”.

BIOGRAPHY