Remarkable site selectivity properties of the ARPES matrix element in Bi$_2$Sr$_2$CaCu$_2$O$_8$

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dc.creatorSahrakorpi, S.
dc.creatorLindroos, M.
dc.creatorBansil, A.
dc.date2003-04-11
dc.date.accessioned2026-07-07T02:50:44Z
dc.date.available2026-07-07T02:50:44Z
dc.descriptionWe show that the ARPES spectra for emission from the bonding as well as the antibonding Fermi surface sheet in Bi$_2$Sr$_2$CaCu$_2$O$_8$ (Bi2212) possess remarkable site selectivity properties in that the emission for photon energies less than 25 eV is dominated by $p \to d$ excitations from just the O-sites in the CuO$_2$ planes. There is little contribution from Cu electrons to the ARPES intensity, even though the initial states at the Fermi energy contain an admixture of Cu-$d$ and O-$p$ electrons. We analyze the origin of this effect by considering the nature of the associated dipole matrix element in detail and find that various possible transition channels (other than $p \to d$ on O-sites) are effectively blocked by either the fact that the related radial cross section is small and/or a lack of available final states. Our prediction that ARPES can preferentially sample Cu or O states by tuning the photon energy suggests novel possibilities for exploiting energy dependent ARPES spectra for probing initial state characters in the cuprates.
dc.description6 pages, 4 figures, Submitted to PRB
dc.identifierhttps://arxiv.org/abs/cond-mat/0304278
dc.identifierhttp://arxiv.org/abs/cond-mat/0304278
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21208
dc.subjectCondensed Matter
dc.titleRemarkable site selectivity properties of the ARPES matrix element in Bi$_2$Sr$_2$CaCu$_2$O$_8$
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