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Raman mode assignments of HgBa2CuO4+δ crystallites

Title
Raman mode assignments of HgBa2CuO4+δ crystallites
Authors
Lee H.-G.Shin H.-S.Yang I.-S.Yu J.-J.Hur N.H.
Ewha Authors
양인상
SCOPUS Author ID
양인상scopus
Issue Date
1994
Journal Title
Physica C: Superconductivity and its applications
ISSN
0921-4534JCR Link
Citation
Physica C: Superconductivity and its applications vol. 233, no. 1-2, pp. 35 - 39
Indexed
SCIE; SCOPUS scopus
Document Type
Article
Abstract
We have studied the Raman modes in HgBa2CuO4+δ crystallites through polarized Raman measurements. The Raman peaks at 158 and 592 cm-1 are assigned to be the Ba A1g mode and the O(2) A1g mode respectively. This is in reasonable agreement with the results of LDA total-energy phonon calculations of HgBa2CuO4+δ. To clarify symmetry and site assignment for the mode near 570 cm-1, we studied its behavior at elevated temperatures. Together with a thermogravimetric analysis (TGA), it is found that the 570 cm-1 mode is not related to the O(3) 'interstitial' oxygen as suggested by some authors. However, the polarization dependence of the 570 cm-1 mode shows no conclusive sign of Eg symmetry contrary to our previous speculation. © 1994.
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자연과학대학 > 물리학전공 > Journal papers
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