Point contact spectroscopy of Pr_2-xCe_xCuO₄ in high magnetic fields

2007/12/10 by Sung Hee Yun, Neesha Anderson, Yun, Sung Hee +8 · 1 citation
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #FOS: Physical sciences #High-pressure geophysics and materials #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.0712.1614

5 pages revtex, 5 postscript figures included, submitted to PRB

arxiv created 2007/12/10 · openalex publication_date 2007/12/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We have studied the density of states of the normal state of the electron-doped superconductor Pr_2-xCe_xCuO₄ at low temperatures and in magnetic fields up to 31 Tesla using point contact spectroscopy on single crystals. Our data clearly reveal an anomalous gap in the normal state density of states. This normal state gap survives even in the highest applied field of 31 T. Our results cast doubt over whether this gap found in electron-doped cuprates is the analog of the pseudogap in hole-doped cuprates. We have suggested an alternate origin of the normal state gap, which involves the effect of disorder and electron correlations at the surface of cuprates.

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