Details

Autor(en) / Beteiligte

• Mishmash, Ryan V
• Garrison, James R
• Bieri, Samuel
• Xu, Cenke

Titel

Theory of a competitive spin liquid state for weak Mott insulators on the triangular lattice

Ist Teil von

• Physical review letters, 2013-10, Vol.111 (15), p.157203-157203, Article 157203

Ort / Verlag

United States

Erscheinungsjahr

2013

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We propose a novel quantum spin liquid state that can explain many of the intriguing experimental properties of the low-temperature phase of the organic spin liquid candidate materials κ-(BEDT-TTF)2Cu2(CN)3 and EtMe3Sb[Pd(dmit)2]2. This state of paired fermionic spinons preserves all symmetries of the system, and it has a gapless excitation spectrum with quadratic bands that touch at momentum k[over →]=0. This quadratic band touching is protected by symmetries. Using variational Monte Carlo techniques, we show that this state has highly competitive energy in the triangular lattice Heisenberg model supplemented with a realistically large ring-exchange term.