Physics – Condensed Matter – Superconductivity
Scientific paper
2003-01-07
Physics
Condensed Matter
Superconductivity
4 pages, 2 figures. To be published in Physical Review B (Brief Report)
Scientific paper
10.1103/PhysRevB.67.092508
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.
Armitage Peter N.
Char Kookrin
Feng D. L.
Kim Chaehyun
Mehta Anita
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