Ground-State Properties for Bilayer Kitaev Model: Dimer Expansion Study

Akihisa Koga, Hiroyuki Tomishige, Joji Nasu

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We study ground-state properties in the bilayer Kitaev model by means of the dimer expansion. The existence of parity symmetries in the system reduces the computational cost significantly. This allows us to expand the ground-state energy and interlayer spin-spin correlation up to the 30th order in the interdimer Kitaev coupling. The numerical calculations clarify that the dimer singlet state is indeed realized in the wide parameter region.

Original languageEnglish
Pages (from-to)1827-1830
Number of pages4
JournalJournal of Superconductivity and Novel Magnetism
Issue number6
Publication statusPublished - 2019 Jun 15


  • Bilayer Kitaev model
  • Dimer expansion


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