New anomaly induced transport in 3D Dirac matter
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New anomaly induced transport in 3D Dirac matter
DIPC Seminars
- Speaker
-
Maria A. H. Vozmediano, ICMM-CSIC
- When
-
2018/07/13
14:00
- Place
- Donostia International Physics Center
- Add to calendar
-
iCal
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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