Anomalous Magnetoresistance of Quasi One-DimensionalHg3−δAsF6

Abstract

Resistivity and magnetoresistance data in the field range 0-180 kG at low temperatures are presented. The temperature dependence ($T^3$), suppression of residual resistance, and large magnetoresistance are understood as resulting from the unusual Fermi surface. In spite of the large number of defects and the relatively weak interchain coupling ($\frac{\Delta \epsilon }{E_{\mathrm{F}}}\sim {10}^{-2\mathrm{}}$) inferred from the magnetoresistance, the states near $E_{\mathrm{F}}$ are extended over distances greater than 100 μm.