Nonlinear σ model method for the J1-J2 Heisenberg model : Disordered Ground State with Plaquette Symmetry

• Takano, Ken-Ichi

• Kito, Yoshiya

• Ono, Yoshiaki

• Sano, Kazuhiro

抄録

A novel nonlinear a model method is proposed for the two-dimensional J1-J2 model, which is extended to include plaquette-type distortion. The nonlinear σ model is properly derived without spoiling the original spin degrees of freedom. A disordered phase is found to continue, without quantum phase transitions, from a frustrated uniform regime to an un frustrated distorted regime. By the continuity and Oshikawa's commensurability condition, the disordered ground states for the uniform J1-J2 model are plaquette states with four-fold degeneracy.

収録刊行物

• Physical Review Letters

  Physical Review Letters 91 (19), 197202-1-197202-4, 2003-11

  American Physical Society

詳細情報

• CRID: 1050001339226709248
• NII論文ID: 120006735332
• NII書誌ID: AA00773679
• ISSN: 00319007
• HANDLE: 10191/1149
• Web Site: https://niigata-u.repo.nii.ac.jp/records/2454
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles