University of Birmingham > Talks@bham > Theoretical Physics Seminars > Chiral anomaly in wave propagation through Weyl and Dirac semimetals

Chiral anomaly in wave propagation through Weyl and Dirac semimetals

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact Dr Hannah Price.

Note: **unusual day of the week**

Owing to their nontrivial topology and relativistic-like electronic spectra, Dirac and Weyl semimetals realize various anomalous responses including the celebrated chiral anomaly. In this talk, I will discuss the manifestations of the chiral anomaly in sound attenuation and electromagnetic field penetration. Due to the interplay of intra- and inter-node scattering processes as well as screening, an external magnetic field generically reduces the sound absorption [1]. A nontrivial dependence on the relative direction of the magnetic field and the sound wave vector, i.e., the magnetic sound dichroism, can occur in materials with nonsymmetric Weyl nodes. I will also demonstrate that the current response to an electromagnetic field in a Weyl or Dirac semimetal becomes nonlocal due to the chiral anomaly even under the conditions of the normal skin effect [2]. Signatures of this nonlocality may be found in the transmission of electromagnetic waves.

[1] P. O. Sukhachov and L. I. Glazman, Anomalous electromagnetic field penetration in a Weyl or Dirac semimetal, Phys. Rev. Lett. 128, 146801 (2022). [2] P. O. Sukhachov and L. I. Glazman, Anomalous sound attenuation in Weyl semimetals in magnetic and pseudomagnetic fields, Phys. Rev. B 103 , 214310 (2021).

This talk is part of the Theoretical Physics Seminars series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.


Talks@bham, University of Birmingham. Contact Us | Help and Documentation | Privacy and Publicity.
talks@bham is based on from the University of Cambridge.