Superconducting HxYBa2Cu3O7: The role of H

C. Y. Yang; X. -Q. Yang; S. M. Heald; J. J. Reilly; T. Skotheim; A. R. Moodenbaugh; M. Suenaga

doi:10.1103/PhysRevB.36.8798

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Superconducting HxYBa2Cu3O7: The role of H

C. Y. Yang, X. -Q. Yang, S. M. Heald, J. J. Reilly, T. Skotheim, A. R. Moodenbaugh, M. Suenaga

DOI 10.1103/PhysRevB.36.8798 · Physical Review B

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Abstract

The role of H in superconducting HxYBa2Cu3O7 (0.14<x<5.0) has been examined in infrared (ir) and x-ray absorption spectroscopy (XAS) measurements. The ir studies indicate the formation of Cu-H bonds and a hybride-phase precipitation. The XAS measurements of one of the samples, H1.0YBa2Cu3O7, show a partial reduction of the Cu2+ state to the Cu1+ state and deformation of both the Cu(1) and Cu(2) sites. The XAS results also confirm that H is located interstitially only near Cu sites.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	91	Pressure not reported	unknown
H0.14YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	92.5	Pressure not reported	unknown
H0.48YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	93.6	Pressure not reported	unknown
H1.0YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	93.2	Pressure not reported	unknown