Journal
PHYSICAL REVIEW B
Volume 105, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.105.L081117
Keywords
-
Funding
- Cambridge Trust
- Winton Programme for the Physics of Sustainability
- Marie Sklodowska-Curie Programme under EC [842901]
- Trinity College at the University of Cambridge
- UKRI Future Leaders Fellowship [MR/V023926/1]
- Gianna Angelopoulos Programme for Science, Technology, and Innovation
- EPSRC [EP/P020259/1, EP/P022561/1]
- UK Materials and Molecular Modelling Hub (EPSRC) [EP/P020194]
- UK National Supercomputing Service, ARCHER
Ask authors/readers for more resources
Weyl semimetals have been studied extensively, and recent research focuses on manipulating the location of Weyl nodes for non-Abelian braiding. A certain type of phase transition imposes a significant reorganization of Weyl nodes, particularly for pairs of nodes with nontrivial topology, which can only be achieved through braiding with adjacent nodes. This motion and braiding process can be driven by small temperature changes.
Weyl semimetals are arguably the most paradigmatic form of a gapless topological phase. While the stability of Weyl nodes, as quantified by their topological charge, has been extensively investigated, recent interest has shifted to the manipulation of the location of these Weyl nodes for non-Abelian braiding. To accomplish this braiding it is necessary to drive significant Weyl node motion using realistic experimental parameter changes. We show that a family of phase transitions characterized by certain symmetry constraints impose that the Weyl nodes have to reorganize by a large amount, shifting from one high-symmetry plane to another. Additionally, for a subset of pairs of nodes with nontrivial Euler class topology, this reorganization can only occur through a braiding process with adjacent nodes. As a result, the Weyl nodes are forced to move a large distance across the Brillouin zone and to braid, all driven by small temperature changes, a process we illustrate with Cd2Re2O7.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available