Orbital diamagnetic susceptibility in excitonic condensation phase

Koudai Sugimoto, Yukinori Ohta

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

We study the orbital diamagnetic susceptibility in excitonic condensation phase using the mean-field approximation for a two-band model defined on a square lattice. We find that, in semiconductors, the excitonic condensation acquires a finite diamagnetic susceptibility due to spontaneous hybridization between the valence and the conduction bands, whereas in semimetals, the diamagnetic susceptibility in the normal phase is suppressed by the excitonic condensation. We also study the orbital diamagnetic and Pauli paramagnetic susceptibilities of Ta2NiSe5 using a two-dimensional three-band model and find that the calculated temperature dependence of the magnetic susceptibility is in qualitative agreement with experiment.

Original languageEnglish
Article number085111
JournalPhysical Review B
Volume94
Issue number8
DOIs
Publication statusPublished - 2016 Aug 8
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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