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29 March 2024
 
  » arxiv » cond-mat/0301057

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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
AbstractWe 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
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