Change search
ReferencesLink to record
Permanent link

Direct link
Field-Selective Anomaly and Chiral Mode Reversal in Type-II Weyl Materials
Stockholm University, Faculty of Science, Department of Physics. Freie Universit├Ąt Berlin, Germany.
Number of Authors: 2
2016 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 117, no 8, 086401Article in journal (Refereed) Published
Abstract [en]

Three-dimensional condensed matter incarnations of Weyl fermions generically have a tilted dispersion-in sharp contrast to their elusive high-energy relatives where a tilt is forbidden by Lorentz invariance, and with the low-energy excitations of two-dimensional graphene sheets where a tilt is forbidden by either crystalline or particle-hole symmetry. Very recently, a number of materials (MoTe2, LaAlGe, and WTe2) have been identified as hosts of so-called type-IIWeyl fermions whose dispersion is so strongly tilted that a Fermi surface is formed, whereby the Weyl node becomes a singular point connecting electron and hole pockets. We here predict that these systems have remarkable properties in the presence of magnetic fields. Most saliently, we show that the nature of the chiral anomaly depends crucially on the relative angle between the applied field and the tilt, and that an inversion-asymmetric overtilting creates an imbalance in the number of chiral modes with positive and negative slopes. The field-selective anomaly gives a novel magneto-optical resonance, providing an experimental way to detect concealed Weyl nodes.

Place, publisher, year, edition, pages
2016. Vol. 117, no 8, 086401
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-134424DOI: 10.1103/PhysRevLett.117.086401ISI: 000381495900002PubMedID: 27588869OAI: diva2:1037240
Available from: 2016-10-14 Created: 2016-10-06 Last updated: 2016-10-14Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Bergholtz, Emil J.
By organisation
Department of Physics
In the same journal
Physical Review Letters
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

ReferencesLink to record
Permanent link

Direct link