Year: 2008
Type: article
Abstract: We numerically study the spin-1/2 antiferromagnetic Heisenberg model on the kagome lattice using the density-matrix renormalization group method. We find that the ground state is a magnetically disordered spin liquid, characterized by an exponential decay of spin-spin correlation function in real space and a magnetic structure factor showing system-size independent peaks at commensurate magnetic wave vectors. We obtain a spin triplet excitation gap DeltaE(S=1)=0.055+/-0.005 by extrapolation based on the large size results, and confirm the presence of gapless singlet excitations. The physical nature of such an exotic spin liquid is also discussed.
Source: Physical Review Letters
Authors: H. C. Jiang, Z. Y. Weng, D. N. Sheng
Institutions: California State University, Northridge, Tsinghua University
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: RUI: Theoretical (Numerical) Investigations of Novel Transport and Topological Properties of Two-Dimensional Interacting Electron Systems, PREM - Multidisciplinary Research and Education in Computational Materials Science, NUMERICAL INVESTIGATIONS OF NOVEL CHARGE AND SPIN HALL EFFECTS IN GRAPHENE AND OTHER SPIN ORBIT COUPLING ELECTRON SYSTEMS
OpenAlex ID: W2054423241