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29 March 2024 |
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X-ray diffraction measurements of the c-axis Debye-Waller factors of YBa2Cu3O7 and HgBa2CaCu2O6 | C. Kim
; A. Mehta
; D.L. Feng
; K.M. Shen
; N.P. Armitage
; K. Char
; S.H. Moon
; Y.Y. Xie
; J. Wu
; | Date: |
7 Dec 2002 | Subject: | Superconductivity | cond-mat.supr-con | Abstract: | We report the first application of x-rays to the measurement of the temperature dependent Bragg peak intensities to obtain Debye-Waller factors on high-temperature superconductors. Intensities of (0,0,l) peaks of YBa2Cu3O7 and HgBa2CaCu2O6 thin films are measured to obtain the c-axis Debye-Waller factors. While lattice constant and some Debye-Waller factor measurements on high Tc superconductors show anomalies at the transition temperature, our measurements by x-ray diffraction show a smooth transition of the c-axis Debye-Waller factors through T$_c$. This suggests that the dynamic displacements of the heavy elements along the c-axis direction in these compounds do not have anomalies at Tc. This method in combination with measurements by other techniques will give more details concerning dynamics of the lattice. | Source: | arXiv, cond-mat/0301057 | Services: | Forum | Review | PDF | Favorites |
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