Evolution toward Quantum Critical End Point in UGe_2

Details Evolution toward Quantum Critical End Point in UGe_2 Evolution toward Quantum Critical End Point in UGe_2

2011-07-05

arxiv.org/abs/1107.0816v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures, to be published in J. Phys. Soc. Jpn

Scientific paper

We report on Hall resistivity and electrical resistivity measurements under pressure and magnetic field in UGe_2 with ferromagnetic (FM) tricriticality. The Hall resistivity sensitively detects the first order metamagnetic transition from a paramagnetic (PM) phase to a FM phase in a large pressure range almost up to the quantum critical end point (QCEP). The drastic change in the Fermi surface at the PM-FM transition is detected up to the vicinity of the QCEP, while a strong modification in the field variation of the inelastic scattering between electrons is observed toward the QCEP. The comparison with the theoretical predictions is made.

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