Giant orbital diamagnetism of three-dimensional Dirac electrons in Sr3PbO antiperovskite

2020/11/26 by S. Suetsugu, K. Kitagawa, Kentaro Kitagawa +10 · 22 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Diamagnetism #Electron #Graphene research and applications #Knight shift #Magnetic field #Magnetic susceptibility #Physics #Quantum mechanics #Superconductivity #Thermal Expansion and Ionic Conductivity #Topological Materials and Phenomena #cond-mat.mtrl-sci #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.103.115117

published in Physical review. B./Physical review. B 103(11) (American Physical Society)

arxiv created 2020/11/26 · openalex publication_date 2021/03/10 · arxiv updated 2021/03/12 · openalex created_date 2021/03/15 · openalex updated_date 2026/08/05

Abstract

Interband mixing in Dirac semimetals has been known theoretically to give rise to a giant orbital diamagnetism when the Fermi level is close to the Dirac point. Here, the authors report a ²⁰⁷Pb NMR study on the three-dimensional Dirac antiperovskite system Sr₃PbO. The analysis of the Knight shift, the magnetic susceptibility, and the spin-lattice relaxation rate for samples with different Fermi levels shows that the enhanced diamagnetism in the bulk magnetic susceptibility of Sr₃PbO does indeed originate from the orbital contribution of Dirac electrons.

Citations

• Measurable Lattice Effects on the Charge and Magnetic Response in Graphene
• Three-Dimensional Dirac Electrons at the Fermi Energy in Cubic Inverse Perovskites: Ca3PbO and Its Family
• Orbital magnetism in coupled-bands models
• Further conventions for NMR shielding and chemical shifts (IUPAC Recommendations 2008)
• QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Topological crystalline insulators and Dirac octets in antiperovskites
• Advanced capabilities for materials modelling with Quantum ESPRESSO
• Normal-state properties of the antiperovskite oxide Sr3−xSnO revealed by Sn<mml:mprescripts/><mml:none/>119-NMR