Details

Autor(en) / Beteiligte

• Liao, H J
• Xie, Z Y
• Chen, J
• Liu, Z Y
• Xie, H D
• Huang, R Z
• Normand, B
• Xiang, T

Titel

Gapless Spin-Liquid Ground State in the S=1/2 Kagome Antiferromagnet

Ist Teil von

• Physical review letters, 2017-03, Vol.118 (13), p.137202-137202, Article 137202

Ort / Verlag

United States

Erscheinungsjahr

2017

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• The defining problem in frustrated quantum magnetism, the ground state of the nearest-neighbor S=1/2 antiferromagnetic Heisenberg model on the kagome lattice, has defied all theoretical and numerical methods employed to date. We apply the formalism of tensor-network states, specifically the method of projected entangled simplex states, which combines infinite system size with a correct accounting for multipartite entanglement. By studying the ground-state energy, the finite magnetic order appearing at finite tensor bond dimensions, and the effects of a next-nearest-neighbor coupling, we demonstrate that the ground state is a gapless spin liquid. We discuss the comparison with other numerical studies and the physical interpretation of this result.