Magnetic susceptibility in three-dimensional nodal semimetals

Mikito Koshino, Intan Fatimah Hizbullah

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

We study the magnetic susceptibility in various three-dimensional gapless systems, including Dirac and Weyl semimetals, and a line-node semimetal. The susceptibility is decomposed into the orbital term, the spin term and also the spin-orbit cross term, which is caused by the spin-orbit interaction. We show that the orbital susceptibility logarithmically diverges at the band touching energy in the point-node case, while it exhibits a stronger δ-function singularity in the line node case. The spin-orbit cross term is shown to be paramagnetic in the electron side while diamagnetic in the hole side, in contrast with other two terms which are both even functions in Fermi energy. The spin-orbit cross term in the nodal semimetal is found to be directly related to the chiral surface current induced by the topological surface modes.

Original languageEnglish
Article number045201
JournalPhysical Review B
Volume93
Issue number4
DOIs
Publication statusPublished - 2016 Jan 4

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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