We measured both intralayer (Rxx) and interlayer (Rzz) magnetoresistances on the same sample of the quasi-one-dimensional organic superconductor (TMTSF)2 Cl O4. When the possible buildup of the electrostatic potential difference along the interlayer direction was properly prohibited, the intralayer resistance Rxx did not show any magic-angle effect. However, when Rxx was measured again on the same sample but with a conventional electrical contact configuration, it showed the magic-angle effect much like in Rzz. We conclude that the magic-angle effects are essentially the interlayer charge transfer phenomena.
|Physical Review B - Condensed Matter and Materials Physics
|Published - 13 Nov 2007