Giant orbital diamagnetism of three-dimensional Dirac electrons in Sr${}_3$PbO antiperovskite

Abstract

In Dirac semimetals, inter-band mixing has been known theoretically to give rise to a giant orbital diamagnetism when the Fermi level is close to the Dirac point. In Bi${}_{1-x}$Sb${}_x$ and other Dirac semimetals, an enhanced diamagnetism in the magnetic susceptibility $\chi$ has been observed and interpreted as a manifestation of such giant orbital diamagnetism. Experimentally proving their orbital origin, however, has remained challenging. Cubic antiperovskite Sr${}_3$PbO is a three-dimensional Dirac electron system and shows the giant diamagnetism in $\chi$ as in the other Dirac semimetals. ${}^{207}$Pb NMR measurements are conducted in this study to explore the microscopic origin of diamagnetism. From the analysis of the Knight shift $K$ as a function of $\chi$ and the relaxation rate $T_1^{-1}$ for samples with different hole densities, the spin and the orbital components in $K$ are successfully separated. The results establish that the enhanced diamagnetism in Sr${}_3$PbO originates from the orbital contribution of Dirac electrons, which is fully consistent with the theory of giant orbital diamagnetism.

References in corpus (24)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Advanced capabilities for materials modelling with Quantum ESPRESSO
• Dirac semimetal in three dimensions
• Observation of the chiral magnetic effect in ZrTe5
• Classification of stable three-dimensional Dirac semimetals with nontrivial topology
• Quantum transport evidence for a three-dimensional Dirac semimetal phase in Cd3As2
• Linear magnetoresistance caused by mobility fluctuations in the n-doped Cd3As2
• Topological Crystalline Insulators and Dirac Octets in Anti-perovskites
• Transport Properties and Diamagnetism of Dirac Electrons in Bismuth
• Three-Dimensional Dirac Electrons at the Fermi Energy in Cubic Inverse Perovskites: Ca_3PbO and its Family
• Orbital magnetism of coupled bands models
• Low-Energy Effective Hamiltonian and the Surface States of Ca_3PbO
• Measurable lattice effects on the charge and magnetic response in graphene
• Unified Formalism for calculating Polarization, Magnetization, and more in a Periodic Insulator
• Type-II Dirac surface states in topological crystalline insulators
• Orbital Magnetism of Bloch Electrons I. General Formula
• Coexistence of topological Dirac fermions in the surface and three-dimensional Dirac cone state in the bulk of ZrTe${}_5$ single crystal
• Emergent Weyl fermion excitations in TaP explored by 181-Ta quadrupole resonance
• Thermodynamic signatures for the existence of Dirac electrons in ZrTe5
• Exotic Landau Diamagnetism and Weyl-Fermions Excitations in TaAs Revealed by ${}^{75}$As NMR and NQR
• Nuclear spin-lattice relaxation time in TaP and the Knight shift of Weyl semimetals
• Magnetotransport in Sr3PbO antiperovskite with three-dimensional massive Dirac electrons
• Nuclear Spin Relaxation Time due to the Orbital Currents in Dirac Electron Systems
• Normal-state properties of the antiperovskite oxide Sr${}_{3-x}$SnO revealed by ${}^{119}$Sn-NMR

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