Gopinath, C. S. ; Hur, Nam H. ; Subramanian, S. (1995) Oxidation state of mercury in HgBa2(Ca0.86Sr0.14)2Cu3O8+δ studied by X-ray photoelectron spectroscopy Physical Review B: Condensed Matter and Materials Physics, 52 (14). R9879-R9881. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v52/i14/pR9879_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.52.R9879
Abstract
Hg 4f core levels of HgBa2(Ca0.86Sr0.14)2Cu3O8+δ (Hg-1223) and HgO were measured by X-ray photoelectron spectroscopy in order to demonstrate the oxidation state of mercury ions in the superconducting oxide. The binding energy of the Hg 4f7/2 level is found to be at 99.9 eV in HgO and 101.0 and 103.4 eV in Hg-1223. This result reveals that the oxidation state of Hg is definitely more than +2 and it exists in a mixed-valent state. The creation of charge carriers in Hg-1223 is discussed in terms of a charge transfer between Hg-Oδ and Cu-O layers.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 61770 |
| Deposited On: | 15 Sep 2011 12:06 |
| Last Modified: | 15 Sep 2011 12:06 |
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