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

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

SUBMITTER: Le Bolloc'h D 

PROVIDER: S-EPMC11698093 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature