Evidence of Topological Nodal-Line Fermions in ZrSiSe and ZrSiTe

2016/04/23 by Jin Hu, Zhijie Tang, Jinyu Liu +10 · 5 citations
Materials Science · Mathematics · Physics and Astronomy · #2D Materials and Applications #Biology #Combinatorics #Fermion #Geometry #Graphene research and applications #Line (geometry) #Mathematics #NODAL #Physics #Quantum mechanics #Theoretical physics #Topological Materials and Phenomena #Topology (electrical circuits) #cond-mat.mes-hall #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevlett.117.016602

published as Phys. Rev. Lett. 117, 016602 (2016)

arxiv created 2016/04/23 · openalex publication_date 2016/06/30 · arxiv updated 2016/07/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

A Dirac nodal-line semimetal phase, which represents a new quantum state of topological materials, has been experimentally realized only in a few systems, including PbTaSe₂, PtSn₄, and ZrSiS. In this Letter, we report evidence of nodal-line fermions in ZrSiSe and ZrSiTe probed in de Haas-van Alphen quantum oscillations. Although ZrSiSe and ZrSiTe share a similar layered structure with ZrSiS, our studies show the Fermi surface (FS) enclosing a Dirac nodal line has a 2D character in ZrSiTe, in contrast with 3D-like FS in ZrSiSe and ZrSiS. Another important property revealed in our experiment is that the nodal-line fermion density in this family of materials (∼10²⁰ cm^-3) is much higher than the Dirac fermion density of other topological materials with discrete nodes. In addition, we have demonstrated ZrSiSe and ZrSiTe single crystals can be thinned down to 2D atomic thin layers through microexfoliation, which offers the first platform to explore exotic properties of topological nodal-line fermions in low dimensions.

Citations

• Topological Insulator Materials
• Evidence for Helical Edge Modes in InvertedInAs/GaSbQuantum Wells
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Observation of a three-dimensional topological Dirac semimetal phase in high-mobility Cd3As2
• A stable three-dimensional topological Dirac semimetal Cd3As2
• Discovery of a Weyl fermion semimetal and topological Fermi arcs
• Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides
• Discovery of Lorentz-violating Weyl fermion semimetal state in LaAlGe materials
• Extremely large and significantly anisotropic magnetoresistance in ZrSiS single crystals
• Discovery of Weyl semimetal state violating Lorentz invariance in MoTe2
• Electronic Evidence for Type II Weyl Semimetal State in MoTe2
• Butterfly Magnetoresistance, Quasi-2D Dirac Fermi Surfaces, and a Topological Phase Transition in ZrSiS

Cited by

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• Weyl Nodal Point–Line Fermion in Ferromagnetic Eu5Bi3
• Inherited weak topological insulator signatures in the topological hourglass semimetal Nb3XTe6 (X=Si, Ge)
• Underlying Topological Dirac Nodal Line Mechanism of the Anomalously Large Electron-Phonon Coupling Strength on a Be (0001) Surface