Angle-resolved photoemission spectroscopy of the antiferromagnetic superconductor NdL87Ce0.13CuO4: Anisotropie spin-correlation gap, pseudogap, and the induced quaslparticle mass enhancement

H. Matsui, K. Terashima, T. Sato, T. Takahashi, S. C. Wang, H. B. Yang, H. Ding, T. Uefuji, K. Yamada

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We performed high-resolution angle-resolved photoemission spectroscopy on Nd1.87Ce0.13CuO4, which is located at the boundary of the antiferromagnetic (AF) and the superconducting phase. We observed that the quasiparticle (QP) effective mass around (π, 0) is strongly enhanced due to the opening of the AF gap. The QP mass and the AF gap are found to be anisotropic, with the largest value near the intersecting point of the Fermi surface and the AF zone boundary. In addition, we observed that the QP peak disappears around the Néel temperature (TV) while the AF pseudogap is gradually filled up at much higher temperatures, possibly due to the short-range AF correlation.

Original languageEnglish
Article number047005
JournalPhysical Review Letters
Issue number4
Publication statusPublished - Feb 4 2005


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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