彭莹莹
点赞：
彭莹莹
点赞：
论文成果
Enhanced Electron-Phonon Coupling for Charge-Density-Wave Formation in La1.8-xEu0.2SrxCuO4+δ
发布时间：2020-09-16点击次数：
影响因子：
0.0
DOI码：
10.1103/PhysRevLett.125.097002
发表刊物：
Physical Review Letters
摘要：
Charge density wave (CDW) correlations are prevalent in all copper-oxide superconductors. While CDWs in conventional metals are driven by coupling between lattice vibrations and electrons, the role of the electron-phonon coupling (EPC) in cuprate CDWs is strongly debated. Using Cu L3 edge resonant inelastic x-ray scattering, we study the CDW and Cu-O bond-stretching phonons in the stripe-ordered cuprate La1.8−xEu0.2SrxCuO4+δ. We investigate the interplay between charge order and EPC as a function of doping and temperature and find that the EPC is enhanced in a narrow momentum region around the CDW ordering vector. By detuning the incident photon energy from the absorption resonance, we extract an EPC matrix element at the CDW ordering vector of M≃0.36 eV, which decreases to M≃0.30 eV at high temperature in the absence of the CDW. Our results suggest a feedback mechanism in which the CDW enhances the EPC which, in turn, further stabilizes the CDW.
论文类型：
期刊论文
学科门类：
理学
一级学科：
物理学
卷号：
125
页面范围：
097002
是否译文：
否
发表时间：
2020-08-25
收录刊物：
SCI