ESR Study of a novel elementary excitation : Breather in quantum spin chains

一种新型基元激发的 ESR 研究：量子自旋链中的呼吸器

• 批准号: 12640335
• 负责人: NOJIRI Hiroyuki
• 金额: $ 2.43万
• 依托单位: OKAYAMA UNIVERSITY (2001)Tohoku University (2000)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640335/
• 关键词: Soliton; High Magnetic Field; Non-linear excitation; Antiferromagnetic chain; ESR; 非線形現象; 量子相転移

A non-linear excitation : breather has been studied in a quantum antiferromagnetic chain CuBenzoate by means of ESR. The anisotropy and the field dependence of the field induced gap has been investigated by a high resolution ESR. In low field region, the exponent of the gap on the magnetic field found to be very close to theoretical value of 2/3. A dynamical crossover between the gapped soliton-breather regime and the gapless spinon regime has been found as the anomaly of ESR line shape and line width. By using a Voight configuration, the energy of breather mode has been determined very precisely without a correction of Zeeman term. In the high field regime, a decrease of the exponent is found. A coupling constant of a sign-Gordon model has been experimentally obtained from the accurate field dependence of the breather mass. High field zero field muon spin rotation experiments have been performed down to 16 mK and no evidence of a long range order is found. It shows the extremely good one-dimensionality of Cubenzoate. Several different types of higher order breather excitations have also found.

非线性激发：通过ESR研究了量子抗铁磁链蛋白酶酸盐中的呼吸器。高分辨率ESR研究了各向异性和场诱导间隙的场依赖性。在低场区域，磁场上的间隙指数非常接近2/3的理论值。发现的孤子呼吸道状态和无间隙Spinon机制之间的动态交叉是ESR线形状和线宽度的异常。通过使用Voight配置，已经确切地确定了呼吸模式的能量，而无需校正Zeeman项。在高场制度中，发现指数减少。从呼吸器质量的准确场依赖性获得了标志模型的耦合常数。高场零场躯体旋转旋转实验已进行至16 mk，找不到远距离顺序的证据。它显示了非常好的一维级别化。还发现了几种不同类型的高级呼吸激发。

项目成果

H.Nojiri et al.: "Submillimeter wave ESR study on quantum spin systems"Suppl.B.J.Phys.Soc.Jpn. 69. 83-88 (2000)

H.Nojiri 等人：“量子自旋系统的亚毫米波 ESR 研究”Suppl.B.J.Phys.Soc.Jpn。

H.Nojiri et al.: "High-field ESR on quantum spin systems"Physica B. 294-295. 14-19 (2001)

H.Nojiri 等人：“量子自旋系统上的高场 ESR”Physica B. 294-295。

Y.Ajiro, T.Asano, Y.Inagaki, J-P.Boucher, H.Nojiri 他3名: "High-Field, high-frequency ESR in the one-dimensional quantum spin systems"Suppl.A.J.Phys.Soc.Jpn. 69. 297-302 (2000)

Y.Ajiro、T.Asano、Y.Inagaki、J-P.Boucher、H.Nojiri 和其他 3 人：“一维量子自旋系统中的高场、高频 ESR”Suppl.A.J.Phys.Soc.Jpn。 69. 297-302 (2000)

H. Nojiri, K. Onizuka, Y. Ueda, T. Asano, Y. Ajiro and M. Motokawa: "Submillimeter wave ESR study on quantum spin systems"Suppl. B. J. Phys. Soc. Jpn. 69. 83-88 (2000)

H. Nojiri、K. Onizuka、Y. Ueda、T. Asano、Y. Ajiro 和 M. Motokawa：“量子自旋系统的亚毫米波 ESR 研究”增刊。

Y. Ajiro, T. Asano, Y. Inagaki, J-P Boucher, H. Nojiri, S. Luther, T. Sakon and M. Motokawa: "High-field, high-frequency ESR in the one-dimensional quantum spin systems"Suppl. A. J. Phys. Soc. Jpn. 69. 297-302 (2000)

Y. Ajiro、T. Asano、Y. Inagaki、J-P Boucher、H. Nojiri、S. Luther、T. Sakon 和 M. Motokawa：“一维量子自旋系统中的高场、高频 ESR”补充