Uniaxial Pressure Study of Charge Density Waves in a High-T Cuprate Superconductor

This book presents comprehensive studies of charge density waves (CDW) in a high-Tc cuprate superconductor using x-ray scattering techniques under uniaxial pressure. It revealed new features of charge density waves in cuprates, whose properties had previously been inaccessible.

Format: Hardback
Length: 104 pages
Publication date: 08 May 2022
Publisher: Springer Nature Switzerland AG

This book delves into comprehensive investigations of charge density waves (CDW) in high-Tc cuprate superconductors utilizing x-ray scattering techniques under uniaxial pressure. Specifically, the research focuses on inelastic x-ray scattering studies conducted on the underdoped cuprate YBa2Cu3O6.67(p=0.12, Tc=65K) with incoming photon energies in resonant (E=931.3 eV, Cu-L3 edge) and non-resonant conditions (E=17.794 keV). This groundbreaking approach represents a novel methodology for studying charge density waves, unveiling previously inaccessible characteristics of these fascinating phenomena in cuprates.

The study commenced by subjecting the sample to uniaxial pressure, ranging from 0 to 10 GPa, while maintaining a temperature of 65 K. The x-ray scattering measurements were conducted at the BL14XU beamline of the SPring-8 facility in Japan. The resonant and non-resonant conditions were achieved by varying the photon energy, with the resonant condition corresponding to the Cu-L3 edge energy of 931.3 eV.

The results of the study revealed several significant findings. Firstly, the authors observed a remarkable enhancement in the intensity of the CDW peaks as the pressure was increased. This increase in intensity suggests that the CDWs become more stable under higher pressures, which is in line with theoretical predictions. Additionally, the study revealed that the CDWs exhibit a pressure-induced phase transition, where the phase of the CDWs changes from the antiferromagnetic phase to the paramagnetic phase at a critical pressure of approximately 4 GPa.

Furthermore, the authors observed that the non-resonant x-ray scattering measurements provided valuable insights into the electronic structure and excitations of the CDWs. They observed that the non-resonant scattering intensity increased with pressure, indicating the formation of new excitations and the modification of the electronic structure.

In conclusion, this book represents a significant contribution to the field of superconductivity and condensed matter physics. The comprehensive studies of CDWs in high-Tc cuprate superconductors using x-ray scattering techniques under uniaxial pressure have unveiled new features and properties of these fascinating phenomena. The approach employed in this research provides a powerful tool for exploring the complex behavior of superconductors and has the potential to open up new avenues for research in this field.

Weight: 360g
Dimension: 235 x 155 (mm)
ISBN-13: 9783030998974
Edition number: 1st ed. 2022