Abstract
The electrical resistivity of Hg 2.86AsF 6 has been studied as a function of temperature. At room temperature, the resistivity along the chain direction is 10 −4 Ω-cm with an anisotropy of about 10 2. This incommensurate linear chain system remains metallic at low temperatures with resistance ratio ϱ ab(300 K)/ ϱ ab(1.4 K) ≅ 3000 and still increasing with no apparent sign of residual resistivity. A large anisotropic magnetic field dependence of the resistivity is observed below 30 K. Near 4 K, the c-axis resistance drops abruptly more than three orders of magnitude, apparently to zero, while ϱ ab is continuous. The c-axis transition is suppressed in a small magnetic field.
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