In-Plane Spectral Weight Shift of Charge Carriers in YBa 2 Cu 3 O 6.9

2004/04/29 by A. V. Boris, N. N. Kovaleva, O. V. Dolgov +4 · 5 citations
Engineering · Materials Science · Physics and Astronomy · #Magnetic and transport properties of perovskites and related materials #Magneto-Optical Properties and Applications #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1126/science.1095532

published as Science 304, 708 (2004)

openalex publication_date 2004/04/29 · arxiv created 2004/05/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31

Abstract

The temperature-dependent redistribution of the spectral weight of the CuO2 plane-derived conduction band of the YBa2Cu3O6.9 high-temperature superconductor (superconducting transition temperature = 92.7 kelvin) was studied with wide-band (0.01- to 5.6-electron volt) spectroscopic ellipsometry. A superconductivity-induced transfer of the spectral weight involving a high-energy scale in excess of 1 electron volt was observed. Correspondingly, the charge carrier spectral weight was shown to decrease in the superconducting state. The ellipsometric data also provide detailed information about the evolution of the optical self-energy in the normal and superconducting states.

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