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IMPRS Seminar: Non-Abelian Anomalies in Multi-Weyl Semimetals

Datum
12.05.2021
Zeit
16:35 - 17:20
Sprecher
Renato Miguel Alves Dantas
Zugehörigkeit
MPI-PKS
Serie
IMPRS-MPSSE Seminar
Sprache
en
Hauptthema
Physik
Andere Themen
Physik
Beschreibung
Quantum anomalies are a central feature of quantum field theories. The most notorious examples of such phenomena are the chiral anomalies, which show upon quantization of chiral massless fermions. In general, quantum field theories depict three types of chiral anomalies: Abelian, non-Abelian, and gravitational.
In the past decade, with the discovery of Weyl semimetals, chiral anomalies have become pertinent in the realm of condensed matter physics. Since then, negative longitudinal magnetoresistance, bearing the signature of Abelian anomaly, has been observed in several Weyl materials and some of them also show an indirect signature of mixed gauge-gravity anomaly in thermal transport.
Recent developments have allowed us to go beyond the original paradigm of linearly dispersing chiral fermions, as nowadays gapless chiral systems with finite band curvatures can be found in various solid-state compounds. In this talk, I will discuss a representative class of such systems, the multi-Weyl semimetals. The effective field theory for multi-Weyl semimetals will be constructed revealing the presence, for the first time in a condensed matter system, of non-Abelian anomalies. The imprint of the anomaly in the transport properties will also be discussed.

Letztmalig verändert: 08.05.2021, 00:07:44

Veranstaltungsort

Max-Planck-Institut für Physik komplexer SystemeNöthnitzer Straße3801187Dresden
Telefon
+ 49 (0)351 871 0
E-Mail
MPI-PKS
Homepage
http://www.mpipks-dresden.mpg.de

Veranstalter

Max-Planck-Institut für Physik komplexer SystemeNöthnitzer Straße3801187Dresden
Telefon
+ 49 (0)351 871 0
E-Mail
MPI-PKS
Homepage
http://www.mpipks-dresden.mpg.de
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