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Cu K-Edge Studies of the Charge Carries in Th-Doped Cuprate System R_(2-x)Th_xCuO_(4-δ) (R = Nd, Sm amd Gd)

Liang, G. and Yi, Y. and Jardim, R. F. and Wang, L. V. (1999) Cu K-Edge Studies of the Charge Carries in Th-Doped Cuprate System R_(2-x)Th_xCuO_(4-δ) (R = Nd, Sm amd Gd). International Journal of Modern Physics B, 13 (29-31). pp. 3750-3754. ISSN 0217-9792. doi:10.1142/S0217979299003854.

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To further study the charge carrier concentration in electron doped cuprate superconductors, a systematic x-ray absorption near edge structure (XANES) measurement has been carried out on Th-doped superconductor system R_(2-x)Th_xCuO_(4-δ) (R=Nd, Sm, and Gd). The XANES results show that, similar to the Ce-doped compounds, while the intensity of the Cu^(1+)4pπ feature increase with the increase of the Th doping level x, the intensities of the Cu2+4pπ and 4pσ features decreases. This clearly indicates that the electrons doped by the Th atoms are injected into the local Cu 3d-orbitals. The normalized Cu^(1+)4pπ intensity data show that the Cu^(1+) concentration in the Th-doped compound series with different R-elements is linearly proportional to the Th doping-level x. The data suggest that both Ce and Th donate the same fraction of electrons into the Cu sites.

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Wang, L. V.0000-0001-9783-4383
Alternate Title:Cu K-Edge Studies of the Charge Carries in Th-Doped Cuprate System R2-xThxCuO4-δ (R = Nd, Sm amd Gd)
Additional Information:© 1999 World Scientific Publishing Company. Received 1 June, 1999; Revised 25 July, 1999. This research was supported by an award from Research Corporation, SHSU, 1995 Texas ARP Grant, and 1997 Texas ATP Grants.
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Research CorporationUNSPECIFIED
Sam Houston State UniversityUNSPECIFIED
Texas Advanced Technology ProgramUNSPECIFIED
Issue or Number:29-31
Record Number:CaltechAUTHORS:20170203-153206043
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Official Citation:CuK-EDGE STUDIES OF THE CHARGE CARRIES IN Th-DOPED CUPRATE SYSTEM R2-xThxCuO4-δ (R=Nd, Sm AND Gd) G. LIANG, Y. YI, R. F. JARDIM, and L. V. WANG International Journal of Modern Physics B 1999 13:29n31, 3750-3754
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74049
Deposited By: Tony Diaz
Deposited On:03 Feb 2017 23:43
Last Modified:11 Nov 2021 05:24

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