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Frustrated S = 1/2 Two-Leg Ladder with Different Leg Interactions
https://repo.qst.go.jp/records/54876
https://repo.qst.go.jp/records/54876ed06b738-4dbd-4586-a276-c9fd0483c790
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-04-08 | |||||
| タイトル | ||||||
| タイトル | Frustrated S = 1/2 Two-Leg Ladder with Different Leg Interactions | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
| 資源タイプ | conference paper | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Tonegawa, T.
× Tonegawa, T.× Okamoto, K.× Hikihara, T.× Sakai, T.× 坂井 徹 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We explore the ground-state phase diagram of the S = 1/2 two-leg ladder. The isotropic leg interactions J1,a and J1,b between nearest neighbor spins in the legs a and b, respectively, are different from each other. The xy and z components of the uniform rung interactions are denoted by Jr and ΔJr, respectively, where Δ is the XXZ anisotropy parameter. This system has a frustration when J1,aJ1,b < 0 irrespective of the sign of Jr. The phase diagrams on the Δ (0≤Δ<1) versus J1,b plane in the cases of J1,a = − 0.2 and J1,a = 0.2 with Jr = −1 are determined numerically. We employ the physical consideration, the level spectroscopy analysis of the results obtained by the exact diagonalization method and also the density-matrix renormalization-group method. It is found that the non-collinear ferrimagnetic (NCFR) state appears as the ground state in the frustrated region of the parameters. Furthermore, the direct-product triplet-dimer (TD) state in which all rungs form the TD pair is the exact ground state, when J1,a + J1,b = 0 and 0≤ Δ lesssim 0.83. The obtained phase diagrams consist of the TD, XY and Haldane phases as well as the NCFR phase. | |||||
| 書誌情報 |
Journal of Physics. Conference Series 巻 828, 号 1, p. 012003-1-01203-8, 発行日 2017-04 |
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| 出版者 | ||||||
| 出版者 | IOP Publishing | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1742-6596 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1088/1742-6596/828/1/012003 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://iopscience.iop.org/article/10.1088/1742-6596/828/1/012003 | |||||
| 関連名称 | http://iopscience.iop.org/article/10.1088/1742-6596/828/1/012003 | |||||
