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Bosonic representation of one-dimensional Heisenberg ferrimagnets
| Title: | Bosonic representation of one-dimensional Heisenberg ferrimagnets |
| Authors: | Yamamoto, Shoji1 Browse this author →KAKEN DB |
| Authors(alt): | 山本, 昌司1 |
| Issue Date: | 2004 |
| Publisher: | American Physical Society |
| Journal Title: | PHYSICAL REVIEW B |
| Volume: | 69 |
| Start Page: | 064426 |
| Publisher DOI: | 10.1103/PhysRevB.69.064426 |
| Abstract: | We present a comparative study of bosonic languages to describe one-dimensional Heisenberg ferrimagnets. The ferrimagnetic Schwinger-boson mean-field theory demonstrated by Wu et al., the antiferromagnetic modified spin-wave theory designed by Takahashi, and its ferrimagnetic variant proposed by Yamamoto et al. are employed to calculate the energy structure and the thermodynamics of various ferrimagnets. A modified spin-wave scheme, which introduces a Lagrange multiplier keeping the native energy structure free from temperature and thus differs from the original Takahashi scheme, is particularly stressed as a useful tool to investigate one-dimensional quantum ferrimagnetism. The antiferromagnetic limit of these descriptions is also considered. |
| Rights: | Copyright © 2004 American Physical Society |
| Relation: | http://www.aps.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/5863 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 山本 昌司
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