COUPLED-CLUSTER APPROXIMATION FOR A SPIN-1 HEISENBERG-ANTIFERROMAGNET WITH ANISOTROPIC EXCHANGE INTERACTION AND EASY-PLANE SINGLE-ION-ANISOTROPY
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摘要In this paper we have applied the coupled-cluster method to investigate the ground state of the spin-I Heisenberg antiferromagnet with anisotropic exchange interaction and easy-plane single-ion anisotropy. A coupled-cluster approximation up to the second level has been performed to evaluate the ground-state energy and staggered magnetization for various lattices such as linear chain, honeycomb, square, simple cubic, and body-centered-cubic lattice. The convergence of our results is fairly rapid, and thus the coupled-cluster method seems to be a practical tool for calculating ground-state energy of a spin system since only the first few levels of approximation will be needed in actual practice.
著者WONG WH, LO CF, WANG YL
期刊名稱Physical Review B (Condensed Matter)
出版年份1994
月份9
日期1
卷號50
期次9
出版社AMERICAN PHYSICAL SOC
頁次6126 - 6136
國際標準期刊號0163-1829
語言英式英語
Web of Science 學科類別Physics; Physics, Condensed Matter; PHYSICS, CONDENSED MATTER

上次更新時間 2020-26-03 於 01:47