期刊论文详细信息
Long-range dynamics related to magnetic impurities in the two-dimensional Heisenberg antiferromagnet | |
Article | |
关键词: SQUARE-LATTICE; FINITE-SIZE; QUANTUM IMPURITY; NQR RELAXATION; SYSTEM; | |
DOI : 10.1103/PhysRevB.68.094426 | |
来源: SCIE |
【 摘 要 】
We consider a magnetic impurity in the two-dimensional Heisenberg antifferomagnet with long-range antiferromagnetic order. The present work employs three different methods: finite cluster considerations, spin-wave perturbation theory, and semiclassical nonlinear sigma model. At low temperature the impurity magnetic susceptibility has a Curie term (proportional to1/T) and a logarithmic correction [proportional to ln (T)]. We calculate the Curie term and the logarithmic correction and derive related Ward identity for the impurity-spin-wave vertex.
【 授权许可】
Free