Microsite es: . Grupo:
You are here

New anomaly induced transport in 3D Dirac matter

Friday, July 13, 2018 - 12:00
Place: 
Donostia International Physics Center
Who: 
Maria A. H. Vozmediano, ICMM-CSIC
Source Name: 
DIPC

After the synthesis of graphene (described at low energies as massless Dirac fermions in 2+1 dimensions) in 2005, Weyl semimetals were synthesized in 2015 . Although they can be seen as 3D graphene, a series of new phenomena arise from the fundamental differences between chiral fermions in two and three dimensions.  Chiral imbalance in 3D implies a set of anomaly related transport phenomena first discussed in the context of high energy collisions (quark-gluon plasma). Examples are the chiral magnetic effect: generation of an electric current parallel to en applied magnetic field, or the axial magnetic effect: generation of an energy current parallel to an axial magnetic field [1].  In this talk we will see some of the implications of these phenomena to the novel Dirac materials.  I will explain the origin of the anomaly--induced response functions and review the experimental evidences found so far. Finally I will describe a novel thermal response function associated to the scale anomaly in Dirac and Weyl semimetals [2].I will try to be pedagogical.
References:[1] The Chiral Magnetic Effect and Anomaly-Induced Transport, Dmitri E. Kharzeev, arXiv:1312.3348.[2] Generation of a Nernst current from the conformal anomaly in Dirac and Weyl semimetals,  Maxim N. Chernodub, Alberto Cortijo, and M. A. H. Vozmediano, Phys. Rev. Lett. 120, 206601 (2018).
Host: Ricardo Díez Muiño

x
We use third party cookies to improve our services and tailor the website to your surfing habits. By continuing to browse the site, you are agreeing to our use of cookies policy. Further information on the use of cookies.