Magnetic Study of Pressure-Induced Superconductivity in the [Pd(dmit)_{2}] Salt with Spin-Gapped Ground State
نویسندگان
چکیده
Static magnetic measurements have been applied for the pressure-induced superconducting state in the P21=m phase of EtMe3P[Pd(dmit)2]2 (Et = C2H5, Me = CH3 and dmit 2 = 1,3-dithiol-2-thione-4,5dithiolate, C3S5 2 ), which exhibits valence bond (VB) ordering with a spin gap at ambient pressure. Evidence for bulk superconductivity is given. The pressure dependence of the transition temperature (Tc) is obtained in the pressure range 0.2–0.5GPa. A possible relation between the VB order and the superconductivity is suggested on the basis of the phase diagram. The nonlinear magnetization process is analyzed to determine the behavior of the lower critical field (Hc1).
منابع مشابه
Variety of valence bond states formed of frustrated spins on triangular lattices based on a two-level system Pd(dmit)2.
Recent studies on the physical properties of the triangular system based on the Pd(dmit)2 salts (dmit=1,3-dithiole-2-thione-4,5-dithiolate) are reviewed. Quantum chemical architectures of the Pd(dmit)2 molecule and its dimer are introduced with emphasis on the strong dimerization of a two-level system, which provides unique physical properties of the salts. The magnetic properties are outlined ...
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