Lou, JZ , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
部门归属:
Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要:
Using the density-matrix renormalization-group (DMRG) technique, we carry out a large scale numerical calculation far the S=2 antiferromagnetic Heisenberg (AFH) chain. We obtain the magnetization curve of S =2 chain near the critical field. The corrections to the magnetization due to the magnon-magnon interaction are the same order for S=2 and S=1 chains. By comparing the experimental magnetization with our calculation, we find that the gap obtained experimentally is about 0.08J which is close to the accurate DMRG estimation for the S=2 AFH chain. Numerical errors in our large scale calculation are also discussed.
Lou, JZ,Qin, SJ,Su, ZB. Magnetization of the S=2 antiferromagnetic Heisenberg chain near the critical magnetic field[J]. PHYSICAL REVIEW B,2000,62(21):13832-13835.
