Abstract
We have studied the magnetoresistance (MR) of the low-dimensional organic charge transfer salt α-(BEDT-TTF) 2RbHg(SCN) 4 at low temperatures and at high dc magnetic fields. Electrical conduction occurs via both the quasi-two-dimensional closed hole orbit portion of the Fermi surface (FS), as well as the quasi-one-dimensional open orbit FS. An antiferromagnetic ordering transition occurs in this material below 10.5 K, which results in a density wave ground state. The consequences of this ordering can be seen in the MR background, which measures the quasi-1D FS. This ordering can be broken with the application of magnetic fields in excess of 32 T for T < 4 K, or with applied pressures of about 8 kbar.
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