X-ray diffraction measurements of the c-axis Debye-Waller factors of YBa2Cu3O7 and HgBa2CaCu2O6

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.

arXiv comment4 pages, 2 figures. To be published in Physical Review B (Brief Report)

References in corpus (4)

• A Possible Phononic Mechanism for $d_{x^2-y^2}$-Superconductivity in the Presence of Short-Range AF Correlations
• 3D-XY critical fluctuations of the thermal expansivity in detwinned YBa2Cu3O7-d single crystals near optimal doping
• Comparison of local structure measurements from c-axis polarized XAFS between a film and a single crystal of YBCO as a function of temperature
• Hole pairing and phonon dynamics in generalized 2D $t-J-$Holstein models

Cited by in corpus (1)

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