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arXiv 0907.1135cond-mat.str-elcond-mat.mtrl-sci
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一维莫特绝缘体中的电自旋子

Electro-spinon in one-dimensional Mott insulator

Hosho Katsura, Masahiro Sato, Takashi Furuta, Naoto Nagaosa

摘要:

从理论上研究了一维电荷转移莫特绝缘体中二聚和非二聚自旋液体态的低能动态光学响应。利用共形场论对非二聚态的低能渐近行为进行了精确的分析。在二聚态下,预测了由两个孤子的束缚态引起的红外吸收,即呼吸模,并对其振子强度进行了精确估计,为实验探测激发单重态提供了一种方法。讨论了外加磁场的影响。

英文摘要:

The low-energy dynamical optical response of dimerized and undimerized spin liquid states in a one-dimensional charge transfer Mott insulator is theoretically studied. An exact analysis is given for the low-energy asymptotic behavior using conformal field theory for the undimerized state. In the dimerized state, the infrared absorption due to the bound state of two solitons, i.e, the breather mode, is predicted with an accurate estimate for its oscillator strength, offering a way to detect experimentally the excited singlet state. Effects of external magnetic fields are also discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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