Abstract
We have grown single crystals of uranium and thorium arsenoselenide and arsenosulphide by the chemical vapour transport method. The crystals show a Kondo-like effect and its contribution to the resistivity was estimated by the determination of the reciprocal residual resistivity ratio (RRRR) ρ(4,2)/ ρ(300). The ratio varied from 0.70 (for UAsS) to 2.10 (for ThAsSe). A high resolution transmission electron microscopy study of ThAsSe crystals reveals a perfect ordering of cations. The X-ray diffraction examination showed that the unit cells of the examined crystals belong to a tetragonal system with the PbFCl-type structure (space group P4/nmm (no. 129)). Anomalously large anisotropic displacement factors have been observed for all the atoms composing the compounds examined. An interdependence between the displacement factor and RRRR has allowed to ascribe both phenomena to the same source. It indicates that the two-level system Kondo model is most suitable for the theoretical description of the systems.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
