Naslov
Nodal-line driven anomalous susceptibility in ZrSiS

Autori
Mario Novak, Bruno Gudac, Markus Kriener, Yuriy V. Sharlai, Grigorii P. Mikitik, Ivan Kokanović

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, ostalo, znanstveni

Skup
SCES2022

Mjesto i datum
Amsterdam, Nizozemska, 24.07.2022. - 29.07.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
Dirac semimetals

Sažetak
We demonstrate a unique approach to test the signature of the nodal-line physics by thermodynamic methods. By measuring magnetic susceptibility in ZrSiS we found an intriguing step-like temperature-driven transition from dia- to paramagnetic behavior. ZrSiS is one of the most studied nodal-line Dirac semimetal with indication of correlation effects. We show that the anomalous behavior represents a real thermodynamic signature of the underlying nodal-line physics through the means of chemical pressure (isovalent substitution of Zr for Hf), quantum oscillations, and theoretical modeling.The anomalous part of the susceptibility is orbital by nature, and it arises due to the vicinity of the Fermi level to a degeneracy point created by the crossing of two nodal lines. Furthermore, an unexpected Lifshitz topological transition at the degeneracy point is revealed by tuning the Fermi level. The present findings in ZrSiS give a new and attractive starting point for various nodal-line physics-related phenomena to be tested by thermodynamic methods in other related materials.

Izvorni jezik
Engleski

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