Naslov
Nodal-line driven anomalous susceptibility in ZrSiS

Autori
Mario Novak

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

Skup
From Solid State to BioPhysics X: From Basic to Life Sciences

Mjesto i datum
Cavtat, Hrvatska, 11.07.2022. - 18.07.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
Nodal line semimetals

Sažetak
We shall present our recent study on the nodal-line Dirac system ZrSiS and our 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. 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 modelling. The anomalous part of the susceptibility is orbital by nature. 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

Znanstvena područja
Fizika

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