The importance of shear on the collective charge transport in CDWs revealed by an XFEL source

• DOI: 10.1126/sciadv.adr6034
• Publication Date: 2025-01-03T18:58:47Z
• Authors: David Le Bolloc’h; Ewen Bellec; Darine Ghoneim; Antoine Gallo-Frantz; Pawel Wzietek; Luc Ortega; Anders Madsen; Pierre Monceau; Mathieu Chollet; Isabel Gonzales-V...; Vincent L. R. Jac...; Aleksandr Sinchenko
• Keywords: Classification of discontinuities

Charge transport in materials has an impact on a wide range of devices based semiconductor, battery, or superconductor technology. sliding charge density waves (CDW) differs from all others that the atomic lattice is directly involved process. To obtain overall picture structural changes associated to collective transport, large coherent x-ray beam generated by free-electron laser (XFEL) source was used. The CDW phase can be retrieved over entire sample diffracted intensities using genetic algorithm. For currents below threshold, increasing shear deformation observed central part while longitudinal appears above threshold when relaxes. Shear thus precedes deformation, with relaxation one leading appearance other. Moreover, strain accumulates surface steps regime, demonstrating strong pinning character these discontinuities. process nanometric involves macroscopic dimensions.