Classical phase diagram of the stuffed honeycomb lattice

Jyotisman Sahoo, Dmitrii Kochkov, Bryan K. Clark, Rebecca Flint

Research output: Contribution to journalArticle

Abstract

We investigate the classical phase diagram of the stuffed honeycomb Heisenberg lattice, which consists of a honeycomb lattice with a superimposed triangular lattice formed by sites at the center of each hexagon. This lattice encompasses and interpolates between the honeycomb, triangular, and dice lattices, preserving the hexagonal symmetry while expanding the phase space for potential spin liquids. We use a combination of iterative minimization, classical Monte Carlo, and analytical techniques to determine the complete ground state phase diagram. It is quite rich, with a variety of noncoplanar and noncollinear phases not found in the previously studied limits. In particular, our analysis reveals the triangular lattice critical point to be a multicritical point with two new phases vanishing via second order transitions at the critical point. We analyze these phases within linear spin wave theory and discuss consequences for the S=1/2 spin liquid.

Original languageEnglish (US)
Article number134419
JournalPhysical Review B
Volume98
Issue number13
DOIs
StatePublished - Oct 11 2018

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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