Thermodynamics of spin-12 tetrameric heisenberg antiferromagnetic chain
文献类型：期刊论文
| 作者 | Gong, Shou-Shu1; Gao, Song2; Su, Gang1 |
| 刊名 | Physical review b
 |
| 出版日期 | 2009-07-01 |
| 卷号 | 80期号:1页码:10 |
| ISSN号 | 1098-0121 |
| 关键词 | Antiferromagnetism Heisenberg model Luttinger liquid Magnetic susceptibility Magnetic transition temperature Magnetisation Renormalisation Specific heat |
| DOI | 10.1103/physrevb.80.014413 |
| 通讯作者 | Su, gang(gsu@gucas.ac.cn) |
| 英文摘要 | The thermodynamic properties of a spin s=1/2 tetrameric heisenberg antiferromagnetic chain with alternating interactions af(1)-af(2)-af(1)-f (af and f denote the antiferromagnetic and ferromagnetic couplings, respectively) are studied by means of the transfer-matrix renormalization-group method and jordan-wigner transformation. it is found that in the absence of magnetic field, the thermodynamic behaviors are closely related to the gapped low-lying excitations, and a novel structure with three peaks in the temperature dependence of specific heat is unveiled. in a magnetic field, a phase diagram in the temperature-field plane for the couplings satisfying j(af1)=j(af2)=j(f) is obtained, in which various phases are identified. the temperature dependence of thermodynamic quantities including the magnetization, susceptibility, and specific heat are studied to characterize the corresponding phases. it is disclosed that the magnetization has a crossover behavior at low temperature in the luttinger liquid phase, which is shown falling into the same class as that in the s=1 haldane chain. in the plateau regime, the thermodynamic behaviors alter at a certain field, which results from the crossing of two excitation spectra. by means of the fermion mapping, it is uncovered that the system has four spectra from fermion and hole excitations that are responsible for the observed thermodynamic behaviors. |
| WOS关键词 | HALDANE-GAP ANTIFERROMAGNETS ; MATRIX RENORMALIZATION-GROUP ; BOND GROUND-STATES ; EXCITATION SPECTRUM ; MAGNETIC-FIELD ; S=1/2 ; PHASE ; BEHAVIOR ; SYSTEMS ; FERROMAGNETS |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Condensed Matter |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000268617100068 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2401775 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Su, Gang |
| 作者单位 | 1.Chinese Acad Sci, Grad Univ, Coll Phys Sci, Beijing 100049, Peoples R China 2.Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gong, Shou-Shu,Gao, Song,Su, Gang. Thermodynamics of spin-12 tetrameric heisenberg antiferromagnetic chain[J]. Physical review b,2009,80(1):10. |
| APA | Gong, Shou-Shu,Gao, Song,&Su, Gang.(2009).Thermodynamics of spin-12 tetrameric heisenberg antiferromagnetic chain.Physical review b,80(1),10. |
| MLA | Gong, Shou-Shu,et al."Thermodynamics of spin-12 tetrameric heisenberg antiferromagnetic chain".Physical review b 80.1(2009):10. |
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来源：中国科学院大学
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