Unique Dirac and Triple point fermiology in simple transition metals and their binary alloys

Abstract

Noble metal surfaces (Au, Ag and Cu etc.) have been extensively studied for the Shockley type surface states (SSs). Very recently, some of these Shockley SSs have been understood from the topological consideration, with the knowledge of global properties of electronic structure. In this letter, we show the existence of Dirac like excitations in the elemental noble metal Ru, Re and Os based on symmetry analysis and first principle calculations. The unique SSs driven Fermi arcs have been investigated in details for these metals. Our calculated SSs and Fermi arcs are consistent with the previous transport and photo-emission results. We attribute these Dirac excitation mediated Fermi arc topology to be the possible reasons behind several existing transport anomalies, such as large non-saturating magneto resistance, anomalous Nernst electromotive force and its giant oscillations, magnetic breakdown etc. We further show that the Dirac like excitations in these elemental metal can further be tuned to three component Fermionic excitations, using symmetry allowed alloy mechanism.

References in corpus (42)

• Maximally-localized generalized Wannier functions for composite energy bands
• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Maximally localized Wannier functions: Theory and applications
• WannierTools: An open-source software package for novel topological materials
• Type-II Weyl Semimetals
• Maximally-localized Wannier functions for entangled energy bands
• Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
• Large intrinsic anomalous Hall effect in half-metallic ferromagnet Co3Sn2S2 with magnetic Weyl fermions
• Topological States on the Gold Surface
• Anomalous Hall Effect in Weyl Metals
• Weyl Semimetals, Fermi Arcs and Chiral Anomalies (A Short Review)
• Experimental Observation of Three-Component 'New Fermions' in Topological Semimetal MoP
• Consequences of breaking time reversal symmetry in LaSb: a resistivity plateau and extreme magnetoresistance
• Triple Point Topological Metals
• Predicted Unusual Magnetoresponse in Type-II Weyl Semimetals
• Large linear magnetoresistance in Dirac semi-metal Cd3As2 with Fermi surfaces close to the Dirac points
• Dirac node lines in pure alkali earth metals
• Anomalous Nernst Effect in Dirac Semimetal Cd3As2
• Anomalous Hall effect in Weyl semimetal half Heusler compounds RPtBi (R = Gd and Nd)
• Experimental tests of the chiral anomaly magnetoresistance in the Dirac-Weyl semimetals Na${}_3$Bi and GdPtBi
• Field-Selective Anomaly and Chiral Mode Reversal in Type-II Weyl Materials
• Magnetic-field-induced relativistic properties in type-I and type-II Weyl semimetals
• Topological Dirac Nodal Lines and Surface Charges in fcc Alkaline Earth Metals
• Are the double Fermi arcs of Dirac semimetals topologically protected?
• Compensated semimetal LaSb with unsaturated magnetoresistance
• Observation of Unusual Topological Surface States in Half-Heusler Compounds LnPtBi (Ln=Lu, Y)
• The extremely large magnetoresistance in the Candidate Type-II Weyl semimetal MoTe2
• Three-component fermions with surface Fermi arcs in topological semimetal tungsten carbide
• Prediction of triple point fermions in simple half-Heusler topological insulators
• Non-saturating large magnetoresistance in semimetals
• Anomalous Hall Effect in type-I Weyl metals
• Anomalous Nernst effect and field-induced Lifshitz transition in Weyl semimetals TaP and TaAs
• Magnetothermoelectric properties of Bi2Se3
• Breakdown of the Chiral Anomaly in Weyl Semimetals in a Strong Magnetic Field
• Quaternary Heusler Alloy: An Ideal Platform to Realize Triple Point Fermion
• Prediction of Ideal Topological Semimetals with Triply Degenerate Points in NaCu${}_3$Te${}_2$ Family
• Underlying topological Dirac nodal line mechanism of anomalously large electron-phonon coupling strength on Be (0001) surface
• Deformation and Stability of Surface States in Dirac semimetals
• Mirror Anomaly in Dirac Semimetals
• Triple point semimetal and topological phase transitions in NaCu${}_3$Te${}_2$
• Quantum Oscillations and Magnetoresistance in Type-II Weyl Semimetals - Effect of a Field Induced Charge Density Wave