Yearbook of the MPS
- Erstmaliger Nachweis von Weyl-Fermionen mittels kernmagnetischer Resonanz
Chemistry • Particle Physics • Quantum Physics • Solid State Research
Research report (imported) 2018 - Max Planck Institute for Chemical Physics of Solids
Evidence for Weyl fermions by the local nuclear magnetic resonance techniques
Physik der Quantenmaterie
Tantalum has one of the largest quadrupole moments among all elements which makes it a rather useful local probe for excitations of Weyl fermions in the new Weyl semimetal TaP. We found three NQR lines in a good agreement with theoretical calculations including spin orbit coupling. The temperature dependence of the spin lattice relaxation rate is attributed to the magnetic excitations at the Weyl nodes and a good agreement with predictions from theory could be found. The microscopic magnetic resonance techniques therefore provide new insides into the class of Weyl semimetals.