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- Title
Control of electronic topology in a strongly correlated electron system.
- Authors
Dzsaber, Sami; Zocco, Diego A.; McCollam, Alix; Weickert, Franziska; McDonald, Ross; Taupin, Mathieu; Eguchi, Gaku; Yan, Xinlin; Prokofiev, Andrey; Tang, Lucas M. K.; Vlaar, Bryan; Winter, Laurel E.; Jaime, Marcelo; Si, Qimiao; Paschen, Silke
- Abstract
It is becoming increasingly clear that breakthrough in quantum applications necessitates materials innovation. In high demand are conductors with robust topological states that can be manipulated at will. This is what we demonstrate in the present work. We discover that the pronounced topological response of a strongly correlated "Weyl-Kondo" semimetal can be genuinely manipulated—and ultimately fully suppressed—by magnetic fields. We understand this behavior as a Zeeman-driven motion of Weyl nodes in momentum space, up to the point where the nodes meet and annihilate in a topological quantum phase transition. The topologically trivial but correlated background remains unaffected across this transition, as is shown by our investigations up to much larger fields. Our work lays the ground for systematic explorations of electronic topology, and boosts the prospect for topological quantum devices. Manipulation of topology of the electronic structure is highly desirable for practical applications of topological materials. Here the authors demonstrate tuning and annihilation of Weyl nodes in momentum space by means of the Zeeman effect in a strongly correlated topological semimetal Ce3Bi4Pd3.
- Subjects
ELECTRONIC control; QUANTUM phase transitions; ZEEMAN effect; MOMENTUM space; TOPOLOGY; METAL-insulator transitions
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-33369-8