Influence of incommensurate dynamic charge-density-wave scattering on the photoemission line shape of superconducting high-T-c cuprates

Article

关键词: QUANTUM CRITICAL-POINT;    HIGH-T(C) SUPERCONDUCTORS;    SPECTRAL PROPERTIES;    NORMAL-STATE;    TEMPERATURE;    FLUCTUATIONS;    LA2-XSRXCUO4;    TRANSITION;    PSEUDOGAP;    CROSSOVER;   

DOI  :  10.1103/PhysRevB.63.224505

来源: SCIE

【 摘 要 】

We show that the spectral line shape of superconducting La2-xSrxCuO4 (LSCO) and Bi2Sr2CaCu2O8+delta (Bi2212) can be well described by the coupling of the charge carriers to collective incommensurate charge density-wave (CDW) excitations. Our results imply that besides antiferromagnetic fluctuations also low-energy CDW modes can contribute to the observed dip-hump structure in the Bi2212 photoemission spectra. In case of underdoped LSCO we propose a possible interpretation of angle resolved photoemission spectroscopy data in terms of a grid pattern of fluctuating stripes where the charge and spin scattering directions deviate by alpha = pi /4. Within this scenario we find that the spectral intensity along (0,0) --> (pi,pi) is strongly suppressed, consistent with recent photoemission experiments. In addition, the incommensurate charge-density-wave scattering leads to a significant broadening of the quasiparticle peak around (pi ,0).

【 授权许可】

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