Gopinath, C. S. ; Subramanian, S. (1994) X-ray photoelectron spectroscopic studies of HgBa2CuO4+δ. Mixed valent mercury and copper Physica C: Superconductivity, 232 (3-4). pp. 222-226. ISSN 0921-4534
Full text not available from this repository.
Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0921-4534(94)90779-X
Abstract
We have used X-ray photoelectron spectroscopy to investigate the oxidation states of Hg and Cu in HgBa2CuO4+δ. Contrary to the general expectations, we have observed three chemically different species of Hg. Two different types of Hg ions are in the 2+ oxidation state and the other species is present in an unusual oxidation state of 3+. Cu also shows the mixed-valent character (1+,2+ and 3+) in this superconductor. Argon-annealed HgBa2CuO4+δ shows a decrease in Hg(III) content suggesting that Hg plans an important role in this superconductor. An internal redox mechanism is predicted in HgBa2CuO4+δ.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 61752 |
| Deposited On: | 15 Sep 2011 12:04 |
| Last Modified: | 15 Sep 2011 12:04 |
Repository Staff Only: item control page
