Abstract
New experiments are reported which investigate the field dependence and anisotropy of the Hall coefficient and magnetoresistivity in single crystals of potassium. These experiments shed light on whether the electronic ground state of potassium is a charge density wave (CDW). They comprise the first independent test of the high field structure in the orientation dependence of the magnetoresistance observed by Coulter and Datars (1980) using an induced torque experiment. At similar levels of sensitivity the authors find no evidence of open orbits in potassium. This result casts doubt on the CDW hypothesis.
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