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arXiv 0810.3789cond-mat.supr-concond-mat.str-el
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HTSC铜酸盐的玻色谱函数:第一部分-强电子-声子相互作用的实验证据

Bosonic Spectral Function in HTSC Cuprates: Part I - Experimental Evidence for Strong Electron-Phonon Interaction

E. G. Maksimov, M. L. Kulic, O. V. Dolgov

摘要:

在第一部分中,我们讨论了在高温超导(HTSC)铜氧化物接近最佳掺杂时,与玻色子谱函数α^{2}F的结构和起源有关的实验证据的积累。结合光学、中子散射、ARPES和隧道效应测量,提取了α^{2}F的一些全局性质,如峰的数目和位置。这些方法给出了在最佳掺杂附近铜酸盐中强电子-声子相互作用(EPI)的令人信服的证据,其中1<λ \lesssim 3。在这里,我们澄清了这些结果是如何有利于Eliashberg理论的HTSC铜酸盐附近的最佳doping.We认为,EPI在HTSC的一些以前的研究中的忽视是基于一些欺骗性的偏见有关的EPI的强度,对一些物理的误解和误导性的解释实验结果。

英文摘要:

In Part I we discuss accumulating experimental evidence related to the structure and origin of the bosonic spectral function α^{2}F in high-temperature superconducting (HTSC) cuprates near optimal doping. Some global properties of α^{2}F such as number and positions of peaks, are extracted by combining optics, neutron scattering, ARPES and tunnelling measurements. These methods give convincing evidence for strong electron-phonon interaction (EPI) with 1<λ\lesssim 3 in cuprates near optimal doping. Here we clarify how these results are in favor of the Eliashberg-like theory for HTSC cuprates near optimal doping.We argue that the neglect of EPI in some previous studies of HTSC was based on a number of deceptive prejudices related to the strength of EPI, on some physical misconceptions and misleading interpretation of experimental results.

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