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Anomalous electronic structure and pseudogap effects in Nd_1.85Ce_0.15CuO_4

N. P. Armitage·D. H. Lu·C. Kim·A. Damascelli·K. M. Shen·F. Ronning·D. L. Feng·P. Bogdanov·Z. -X. Shen·Y. Onose·Y. Taguchi·Y. Tokura·P. K. Mang·N. Kaneko·M. Greven
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Abstract

We report a high-resolution angle-resolved photoemission spectroscopic (ARPES) study of the electron-doped (n-type) cuprate superconductor Nd_1.85Ce_0.15CuO_4. We observe regions along the Fermi surface where the near-E_F intensity is suppressed and the spectral features are broad in a manner reminiscent of the high-energy ``pseudogap'' in the underdoped p-type (hole doped) cuprates. However, instead of occurring near the (pi, 0) region, as in the p-type materials, this pseudogap falls near the intersection of the underlying Fermi surface with the antiferromagnetic Brillouin zone boundary.

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N. P. Armitage, D. H. Lu, C. Kim, A. Damascelli, K. M. Shen, F. Ronning, D. L. Feng, P. Bogdanov, Z. -X. Shen, Y. Onose, Y. Taguchi, Y. Tokura, P. K. Mang, N. Kaneko, M. Greven. 2001-07-12. Anomalous electronic structure and pseudogap effects in Nd_1.85Ce_0.15CuO_4. https://doi.org/10.1103/physrevlett.87.147003

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