Field Reentrance of the Hidden Order State of URu2Si2 under Pressure

Details Field Reentrance of the Hidden Order State of URu2Si2 under Pressure Field Reentrance of the Hidden Order State of URu2Si2 under Pressure

2009-03-18

arxiv.org/abs/0903.3137v1

J. Phys. Soc. Jpn. 78 (2009) 053701

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 6 figures, accepted for publication in J. Phys. Soc. Jpn

Scientific paper

10.1143/JPSJ.78.053701

Combination of neutron scattering and thermal expansion measurements under pressure shows that the so-called hidden order phase of URu2Si2 reenters in magnetic field when antiferromagnetism (AF) collapses at H_AF (T). Macroscopic pressure studies of the HO-AF boundaries were realized at different pressures via thermal expansion measurements under magnetic field using a strain gauge. Microscopic proof at a given pressure is the reappearance of the resonance at Q_0=(1,0,0) under field which is correlated with the collapse of the AF Bragg reflections at Q_0.

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