Angular dependence of Pr-derived features in photoemission studies of Y _x Pr _1-x BaCu _2 O _7+\delta

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Session Q11 - HTSC: PHOTOEMISSION
Mixed session, Friday morning, March 24, 8:00
Room B3, San Jose Convention Center

[Q11.07] Angular dependence of Pr-derived features in photoemission studies of Y _x Pr _1-x BaCu _2 O _7+\delta

M.C. Schabel,Z.-X. Shen (Department of Applied Physics, Stanford University, Stanford, CA 94305),J.L. Peng,R.L. Greene (Center for Superconducting Research, Department of Physics, University of Maryland, College Park, MD 20742)

Praseodymium is anomalous among the rare earths because it strongly suppresses superconductivity when substituted for Y in YBaCu _2 O _7+\delta . We have investigated the angle dependence of the near E _F electronic structure of a number of Y _x Pr _1-x BaCu _2 O _7+\delta samples using resonance photoemission. By allowing discrimination of spectral features associated with the Pr 4f orbitals, these data provide strong evidence for hybridization with the valence band orbitals.

Part Q of program listing