Fermi Surface of Alpha-Uranium at Ambient Pressure

Details Fermi Surface of Alpha-Uranium at Ambient Pressure Fermi Surface of Alpha-Uranium at Ambient Pressure

2009-05-21

arxiv.org/abs/0905.3505v1

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 4 figures, 3 tables

Scientific paper

We have performed de Haas-van Alphen measurements of the Fermi surface of alpha-uranium single crystals at ambient pressure within the alpha-3 charge density wave (CDW) state from 0.020 K - 10 K and magnetic fields to 35 T using torque magnetometry. The angular dependence of the resulting frequencies is described. Effective masses were measured and the Dingle temperature was determined to be 0.74 K +/- 0.04 K. The observation of quantum oscillations within the alpha-3 CDW state gives new insight into the effect of the charge density waves on the Fermi surface. In addition we observed no signature of superconductivity in either transport or magnetization down to 0.020 K indicating the possibility of a pressure-induced quantum critical point that separates the superconducting dome from the normal CDW phase.

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