Kaneshita Eiji, Ichioka Masanori, Machida Kazushige
Department of Physics, Okayama University, Okayama 700-8530, Japan.
Phys Rev Lett. 2002 Mar 18;88(11):115501. doi: 10.1103/PhysRevLett.88.115501. Epub 2002 Feb 28.
Phonon anomalies observed in various high T(c) cuprates by neutron experiments are analyzed theoretically in terms of the stripe concept. The phonon self-energy correction is evaluated by taking into account the charge collective modes of stripes, giving rise to dispersion gap, or kink and shadow phonon modes at twice the wave number of spin stripe. These features coincide precisely with observations. The gapped branches of the phonon are found to be in-phase and out-of-phase oscillations relative to the charge collective mode.
通过中子实验在各种高温铜酸盐中观察到的声子异常，根据条纹概念进行了理论分析。通过考虑条纹的电荷集体模式来评估声子自能修正，这会导致色散间隙，或在自旋条纹波数两倍处出现扭结和影子声子模式。这些特征与观测结果精确吻合。发现声子的带隙分支相对于电荷集体模式是同相和异相振荡。
