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arXiv 0907.4030cond-mat.supr-concond-mat.str-el
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铜氧化物超导体中准粒子谱和Bogoliubov角的动量依赖性

Momentum dependence of quasiparticle spectrum and Bogoliubov angle in cuprate superconductors

Weifang Wang, Zhi Wang, Jingge Zhang, Shiping Feng

摘要:

在动能驱动的超导机制下,研究了铜氧化物超导体中低能准粒子谱和相应的Bogoliubov角的动量依赖性。通过计算低能准粒子谱的正负能量比,表明Bogoliubov角在费米交叉点处单调增加。结果还表明,尽管配对机制是由自旋激发交换的动能驱动的,但低能准粒子峰的超导相干性可以用简单的d波Bardeen-Cooper-Schrieffer形式描述.

英文摘要:

The momentum dependence of the low energy quasiparticle spectrum and the related Bogoliubov angle in cuprate superconductors are studied within the kinetic energy driven superconducting mechanism. By calculation of the ratio of the low energy quasiparticle spectra at positive and negative energies, it is shown that the Bogoliubov angle increase monotonically across the Fermi crossing point. The results also show that the superconducting coherence of the low energy quasiparticle peak is well described by a simple d-wave Bardeen-Cooper-Schrieffer formalism, although the pairing mechanism is driven by the kinetic energy by exchanging spin excitations.

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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