Experimental proof of a structural origin for the shadow Fermi surface in Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$

(2) Tampere University of Technology; (3) EPFL Lausanne; (4) Swiss Light Source; A. Mans (1); Department of Physics; H. Berger (3); Institut de Physique de la Matiere Complexe; I. Santoso (1); L. Patthey (4); M. Lindroos (2)

arxiv: cond-mat/0508127 · v2 · submitted 2005-08-04 · ❄️ cond-mat.supr-con · cond-mat.str-el

Experimental proof of a structural origin for the shadow Fermi surface in Bi₂Sr₂CaCu₂O_(8+δ)

A. Mans (1) , I. Santoso (1) , Y. Huang (1) , W. Siu (1) , S. Tavaddod (1) , V. Arpiainen (2) , M. Lindroos (2) , H. Berger (3)

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V. N. Strocov (4) M. Shi (4) L. Patthey (4) M. S. Golden (1). ((1) Van der Waals-Zeeman Institute University of Amsterdam (2) Tampere University of Technology Department of Physics (3) EPFL Lausanne Institut de Physique de la Matiere Complexe (4) Swiss Light Source Paul Scherrer Institute)

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classification ❄️ cond-mat.supr-con cond-mat.str-el

keywords structuralsurfacecacudeltafermioriginphotoemissionshadow

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By combining surprising new results from a full polarization analysis of nodal angle-resolved photoemission data from pristine and modulation-free Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ 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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Experimental proof of a structural origin for the shadow Fermi surface in Bi₂Sr₂CaCu₂O_(8+δ)

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