Inverse photoemission studies of the high-Tc superconductors

A. J. Viescas; J. M. Tranquada; A. R. Moodenbaugh; P. D. Johnson

doi:10.1103/PhysRevB.37.3738

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Inverse photoemission studies of the high-Tc superconductors

A. J. Viescas, J. M. Tranquada, A. R. Moodenbaugh, P. D. Johnson

DOI 10.1103/PhysRevB.37.3738 · Physical Review B

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Abstract

We present inverse photoemission spectra recorded from the high-Tc superconductors La1.85Sr0.15CuO4 and YBa2Cu3O7 and the related compound CuO. We are able to identify the various unoccupied orbitals associated with the La, Y, and Ba sites. For the YBa2Cu3O7 compound we observe the unoccupied O 2p holes above the Fermi level but do not observe the equivalent holes in the La compound. The inverse photoemission spectrum from CuO shows no pronounced structure.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	30	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	93	Pressure not reported	unknown