Superconductivity and Magnetoresistance Oscillations in Weakly Pressurized Quasi One-Dimensional Superconductor (DMET-TSeF)₂AuI₂

抄録

Low-temperature magnetoresistance measurements were used to characterize the superconducting state and the electronic structure of the quasi one-dimensional salt (DMET-TSeF)₂AuI₂. The measurements revealed an essential role of small pressure created by grease molding. The small pressure suppressed the resistance jumps so that the intrinsic properties of the salt were clearly observed. The upper critical fields were determined for all three principal crystallographic directions. In contrast to strain-free samples, slightly pressurized samples show clear angle-dependent magnetoresistance oscillations related to the Fermi surface topology, demonstrating close similarity to the (TMTSF)₂X salts.