Experimental proof of a structural origin for the shadow Fermi surface in Bi₂Sr₂CaCu₂O_8+δ

2005/08/04 by A. Mans, Mans, A., Iman Santoso +22 · 1 citation
Physics and Astronomy · Earth and Planetary Sciences · #Physics of Superconductivity and Magnetism #Surface and Thin Film Phenomena #High-pressure geophysics and materials

paper · pdf · doi:10.48550/arxiv.cond-mat/0508127

Abstract

By combining surprising new results from a full polarization analysis of nodal angle-resolved photoemission data from pristine and modulation-free Bi₂Sr₂CaCu₂O_8+δ with structural information from LEED and \it ab initio one-step photoemission simulations, we prove that the shadow Fermi surface in these systems has structural origin, being due to orthorhombic distortions from tetragonal symmetry present in both surface and bulk. Consequently, one of the longest standing open issues in the fermiology of these widely studied systems finally meets its resolution.

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• Dark states of electrons in a quantum system with two pairs of sublattices

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