Superconductivity and charge density wave formation in TlxV6S8

作者：Miclea C F; Hochheimer H D; Martin B; Miclea C^*; Ohtani T

来源：New Journal of Physics, 2013, 15(8): 083008.

DOI：10.1088/1367-2630/15/8/083008

We report on specific heat and resistivity measurements under hydrostatic pressure on the quasi-one dimensional metal TlxV6S8. We studied the interplay between the low temperature superconducting (SC) ground state and a high temperature charge density wave (CDW) instability. We observed a clear dependency of the physical properties of TlxV6S8 on the Tl concentration x. The CDW anomaly is present in all investigated samples that are strongly enhanced at half Tl filling, x = 0.47. This is also the only composition for which no signature of superconductivity is observed. The specific heat results regarding the SC phase in Tl0.63V6S8 suggest that this compound is a highly anisotropic, weak coupling superconductor. Pressure suppresses both SC and CDW transitions to lower temperatures. Neverthe

• 出版日期2013-8-2