Fermi surface of ReO3above the "compressibility-collapse" transition

Abstract

The ReO/sub 3/ Fermi surface above the pressure-induced ''compressibility-collapse'' transition is derived from the simple-cubic band structure, assuming T/sup 5//sub h/(Im3) symmetry for the distorted phase. A new set of closely spaced de Haas--van Alphen (dHvA) frequencies have been observed which are consistent with this model. Magnetic-breakdown effects dominate the dHvA data at higher magnetic fields. As a result, only three relatively low frequencies, all involving orbits on the new first-zone hole surface, have been detected thus far.