Oxygen phonon branches in overdopedLa1.7Sr0.3Cu3O4

2006/10/04 by L. Pintschovius, D. Reznik, K. Yamada · 4 citations
Chemistry · Materials Science · Physics and Astronomy · #Charge (physics) #Chemistry #Condensed matter physics #Crystallography #Doping #Magnetic and transport properties of perovskites and related materials #Materials science #Particle physics #Phonon #Physics #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.74.174514

6 pages, 8 figures

arxiv created 2006/10/04 · openalex publication_date 2006/11/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The dispersion of Cu--O bond-stretching vibrations in overdoped La_1.7Sr_0.3CuO₄ (not superconducting) has been studied by high-resolution inelastic neutron scattering. It was found that the doping-induced renormalization of the so-called breathing and half-breathing modes is larger than in optimally doped La_1.85Sr_0.15CuO₄. On the other hand, the phonon linewidths are generally smaller in the overdoped sample. Features observed in optimally doped La_1.85Sr_0.15CuO₄ which suggest a tendency towards charge stripe formation are absent in overdoped La_1.7Sr_0.3CuO₄.

Citations

• Electron-Phonon Interaction in thet−JModel
• Evidence for ubiquitous strong electron–phonon coupling in high-temperature superconductors
• Growth, Characterization and Application of Single-Crystal La2-xSrxCuO4 Having a Gradient in Sr Concentration
• Electron–phonon coupling reflecting dynamic charge inhomogeneity in copper oxide superconductors

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