### 摘要

Based on a symmetry analysis of the microscopic Hubbard and t-J models, a systematic low-energy effective field theory is constructed for hole-doped antiferromagnets on the honeycomb lattice. In the antiferromagnetic phase, doped holes are massive due to the spontaneous breakdown of the SU( _{2)s} symmetry, just as nucleons in Quantum Chromodynamics (QCD) pick up their mass from spontaneous chiral symmetry breaking. In the broken phase, the effective action contains a single-derivative term, similar to the Shraiman-Siggia term in the square lattice case. Interestingly, an accidental continuous spatial rotation symmetry arises at leading order. As an application of the effective field theory, we consider one-magnon exchange between two holes and the formation of two-hole bound states. As an unambiguous prediction of the effective theory, the wave function for the ground state of two holes bound by magnon exchange exhibits f-wave symmetry.

原文 | 英語 |
---|---|

文章編號 | 075123 |

期刊 | Physical Review B - Condensed Matter and Materials Physics |

卷 | 85 |

發行號 | 7 |

DOIs | |

出版狀態 | 已發佈 - 2012 二月 21 |

### ASJC Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics

## 指紋 深入研究「Systematic low-energy effective field theory for magnons and holes in an antiferromagnet on the honeycomb lattice」主題。共同形成了獨特的指紋。

## 引用此

*Physical Review B - Condensed Matter and Materials Physics*,

*85*(7), [075123]. https://doi.org/10.1103/PhysRevB.85.075123