Magneto-transport properties of the "hydrogen atom" nodal-line semimetal candidates CaTX (T=Ag, Cd, X=As, Ge)

Abstract

Topological semimetals are characterized by protected crossings between conduction and valence bands. These materials have recently attracted significant interest because of the deep connections to high-energy physics, the novel topological surface states, and the unusual transport phenomena. While Dirac and Weyl semimetals have been extensively studied, the nodal-line semimetal remains largely unexplored due to the lack of an ideal material platform. In this paper, we report the magneto-transport properties of two nodal-line semimetal candidates CaAgAs and CaCdGe. First, our single crystalline CaAgAs supports the first "hydrogen atom" nodal-line semimetal, where only the topological nodal-line is present at the Fermi level. Second, our CaCdGe sample provides an ideal platform to perform comparative studies because it features the same topological nodal line but has a more complicated Fermiology with irrelevant Fermi pockets. As a result, the magnetoresistance of our CaCdGe sample is more than 100 times larger than that of CaAgAs. Through our systematic magneto-transport and first-principles band structure calculations, we show that our CaTX compounds can be used to study, isolate, and control the novel topological nodal-line physics in real materials.

References in corpus (11)

• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Titanic Magnetoresistance in WTe2
• Topological Node-Line Semimetal in Three Dimensional Graphene Networks
• Linear magnetoresistance caused by mobility fluctuations in the n-doped Cd3As2
• Anisotropic Magnetotransport and Exotic Longitudinal Linear Magnetoresistance in WTe2 Crystals
• Topological semimetals and topological insulators in rare earth monopnictides
• Linear magnetoresistance in a quasi-free two dimensional electron gas in an ultra-high mobility GaAs quantum well
• Topological surface superconductivity in doped Weyl loop materials
• Low Carrier Density Metal Realized in Candidate Line-Node Dirac Semimetals CaAgP and CaAgAs
• Topological Crystalline Metal in Orthorhombic Perovskite Iridates

Cited by in corpus (47)

• Observation of Dirac-like energy band and ring-torus Fermi surface associated with the nodal line in topological insulator CaAgAs
• Topological crystalline superconductivity and second-order topological superconductivity in nodal-loop materials
• Topological transport in Dirac nodal-line semimetals
• Topological surface electronic states in candidate nodal-line semimetal CaAgAs
• A Class of topological nodal rings and its realization in carbon networks
• Magnetotransport properties of the topological nodal-line semimetal CaCdSn
• Evidence for a Dirac nodal-line semimetal in SrAs${}_3$
• Coexistence of Tunable Weyl Points and Topological Nodal Lines in Ternary Transition-Metal Telluride TaIrTe4
• Large magnetoresistance and non-zero Berry phase in the nodal-line semimetal MoO2
• Electronic Transport Evidence for Topological Nodal-Line Semimetals of ZrGeSe single crystals
• Electronic structure and physical properties of EuAuAs single crystal
• Trivial topological phase of CaAgP and the topological nodal-line transition in CaAg(P1-xAsx)
• Topological and trivial magnetic oscillations in nodal loop semimetals
• Interplay between short-range correlated disorder and Coulomb interaction in nodal-line semimetals
• Parity Anomaly in the non-linear response of Nodal-Line Semimetals
• Quantum oscillations probe the Fermi surface topology of the nodal-line semimetal CaAgAs
• Magnetic order induces symmetry breaking in the single crystalline orthorhombic CuMnAs semimetal
• Non-trivial topology in a layered Dirac nodal-line semimetal candidate SrZnSb${}_2$ with distorted Sb square nets
• Spindle Nodal Chain in Three-Dimensional alpha' Boron
• Experimental and theoretical study of the correlated compound YbCdSn: Evidence for large magnetoresistance and mass enhancement
• Dynamical conductivity in topological nodal-line semimetal ZrSiS
• Nodal-line semimetals from Weyl superlattices
• Significant change in the electronic behavior associated with structural distortions in the single crystalline SrAg4As2
• Perovskite-type YRh${}_3$B with multiple types of nodal point and nodal line states
• Electronic structure and physical properties of candidate topological material GdAgGe
• Electronic properties of topological insulator candidate CaAgAs
• Pressure-induced Superconductivity in Zintl Topological Insulator SrIn2As2
• Effect of mechanical strain on the optical properties of nodal-line semimetal ZrSiS
• High-Mobility Carriers Induced by Chemical Doping in the Candidate Nodal-Line Semimetal CaAgP
• Magnetotransport properties of the layered CaAl2Si2 semimetal hosting multiple nontrivial topological states
• Real spin and pseudospin topologies in the noncentrosymmetric topological nodal-line semimetal CaAgAs
• Anomalous Andreev Reflection on a Torus-Shaped Fermi Surface
• Quantum oscillations and nontrivial topological state in a compensated semimetal TaP2
• Anisotropic non-linear optical response of nodal loop materials
• Drumhead surface states and their signatures in quasiparticle scattering interference
• Magnetoresistance and Kondo effect in the nodal-line semimetal VAs${}_2$
• Many-body effects in nodal-line semimetals: correction to the optical conductivity
• Dispersive Drumhead States in Nodal-Line Semimetal Junctions
• Interlocking nodal chains and their examples in carbon networks
• Robust magnetoresistance in TaAs2 under pressure up to about 37 GPa
• Tunneling in an anisotropic cubic Dirac semi-metal
• Delocalization of topological surface states by diagonal disorder in nodal loop semimetals
• Electrochemical transport in Dirac nodal-line semimetals
• Tunneling phase diagrams in anisotropic Multi-Weyl semimetals
• Time dependent electric transport in nodal-loop semimetals
• Interfaces of nodal-line semimetals: drum states, transport and refraction
• Finite size and volume effects in line node semimetals: a first-principles investigation