Correlation between the superconducting transition temperature and Madelung site potential difference in YBa2Cu3OX

T. J. Tang; Lance Horng

doi:10.1016/0921-4526(94)91574-1

Correlation between the superconducting transition temperature and Madelung site potential difference in YBa₂Cu₃O_X

T. J. Tang, Lance Horng

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

The Madelung site potentials have been calculated in YBa₂Cu₃O_X system in order to find the role of the difference in the Madelung site potentials ΔV_T and ΔV_M within the ionic model. The bond valence sum of each of the ions in the YBa₂Cu₃O_X compound is assigned as charge of the corresponding ion in the calculation of the Madelung site potential. Correlations between ΔV = 0.75 ΔV_M +0.25ΔV_T obtained and superconducting transition temperature T_c are examined and found qualitatively very good agreement with the well-know experimental result for the various oxygen content x. This also supports that the usual believing ΔV_M is of primary important parameter to control T_c. The reason will be argued in this paper.

Original language	English
Pages (from-to)	2149-2150
Number of pages	2
Journal	Physica B: Physics of Condensed Matter
Volume	194-196
Issue number	PART 2
DOIs	https://doi.org/10.1016/0921-4526(94)91574-1
Publication status	Published - 1994 Feb 2

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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abstract = "The Madelung site potentials have been calculated in YBa2Cu3OX system in order to find the role of the difference in the Madelung site potentials ΔVT and ΔVM within the ionic model. The bond valence sum of each of the ions in the YBa2Cu3OX compound is assigned as charge of the corresponding ion in the calculation of the Madelung site potential. Correlations between ΔV = 0.75 ΔVM +0.25ΔVT obtained and superconducting transition temperature Tc are examined and found qualitatively very good agreement with the well-know experimental result for the various oxygen content x. This also supports that the usual believing ΔVM is of primary important parameter to control Tc. The reason will be argued in this paper.",

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AB - The Madelung site potentials have been calculated in YBa2Cu3OX system in order to find the role of the difference in the Madelung site potentials ΔVT and ΔVM within the ionic model. The bond valence sum of each of the ions in the YBa2Cu3OX compound is assigned as charge of the corresponding ion in the calculation of the Madelung site potential. Correlations between ΔV = 0.75 ΔVM +0.25ΔVT obtained and superconducting transition temperature Tc are examined and found qualitatively very good agreement with the well-know experimental result for the various oxygen content x. This also supports that the usual believing ΔVM is of primary important parameter to control Tc. The reason will be argued in this paper.

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