Rotation symmetry breaking in La2-xSrxCuO4 revealed by angle-resolved photoemission spectroscopy

Article

关键词: FERMI-SURFACE;    NEUTRON-SCATTERING;    ORDER;    SUPERCONDUCTIVITY;    INSTABILITY;    COEXISTENCE;    EVOLUTION;    SPINS;    HOLES;    ARCS;   

DOI  :  10.1103/PhysRevB.95.224504

来源: SCIE

【 摘 要 】

Using angle-resolved photoemission spectroscopy it is revealed that in the vicinity of optimal doping the electronic structure of La2-x SrxCuO4 cuprate undergoes an electronic reconstruction associated with a wave vector q(a) = (pi, 0). The reconstructed Fermi surface and folded band are distinct to the shadow bands observed in BSCCO cuprates and in underdoped La2-xSrxCuO4 with x <= 0.12, which shift the primary band along the zone diagonal direction. Furthermore, the folded bands appear only with q(a) = (pi, 0) vector, but not with q(b) = (0, pi). We demonstrate that the absence of q(b) reconstruction is not due to thematrix-element effects in the photoemission process, which indicates the fourfold symmetry is broken in the system.

【 授权许可】

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