Charge-density-wave behaviour in intercalated single crystal Nb3Te4
Abstract Judging by the influence of 12 guests on the CDW, they divide into two groups of which Ag and Tl appear representative. In both ternary compounds the CDW is suppressed when about 0.25 and 0.10 mole fraction respectively are intercalated. When the Ag content is increased a weak resistance peak near 46 K, also present in the pure host, grows in magnitude but retains a constant onset; the origin is unclear. Increasing the Tl concentration not only causes the CDW to reappear but the onset temperature is enhanced by up to 125 K over that in the pure host. For small mole fractions the CDW onset temperature appears to correlate with the conduction electron density. Although Tl appears to cause minimal disorder in the quasi 1-D Nb chains, initial results do not suggest non-ohmic CDW related behaviour up to fields of a few V cm −1 . No guest order/disorder transitions are apparent when cooling to 10 K.