Séminaire de Physique Théorique

Unconventional magnetotransport in Weyl semimetals
Alberto Cortijo (Institute of Material Sciences of Madrid, Spain)
Thursday 14 December 2017 14:00 -  Tours -  Salle 1180 (Bât E2)

Résumé :
In this talk I will review some transport properties in Weyl semimetals that are connected to the geometrical properties of the bandstructure in these systems, like the (now) famous B^2 dependent negative magnetoresistance, observed in these materials[1]. Within this context, I will describe other transport phenomena that were supposed not to be allowed in these materials[2], like the linear magnetochiral effect[3]. I will describe how this effect also allows for the presence of second order non linear optical responses in inversion symmetric Dirac semimetals under the presence of an external magnetic field[4]. [1].D. T. Son and B. Z. Spivak."Chiral anomaly and classical negative magnetoresistance of Weyl metals". Phys. Rev. B 88, 104412 (2013) [2]. A. A. Zyuzin and A. A. Burkov. "Topological response in Weyl semimetals and the chiral anomaly" Phys. Rev. B 86, 115133 (2012) [3] A. Cortijo. "Linear magnetochiral effect in Weyl semimetals". Phys. Rev. B 94, 241105(R) (2016) [4] A. Cortijo "Magnetic-field-induced nonlinear optical responses in inversion symmetric Dirac semimetals". Phys. Rev. B 94, 235123 (2016)

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