On the destruction of the hidden order in URu${}_2$Si${}_2$ by a strong magnetic field

Abstract

We present a study of transport properties of the heavy fermion URu${}_2$Si${}_2$ in pulsed magnetic field. The large Nernst response of the hidden order state is found to be suppressed when the magnetic field exceeds 35 T. The combination of resistivity, Hall and Nernst data outlines the reconstruction of the Fermi surface in the temperature-field phase diagram. The zero-field ground state is a compensated heavy-electron semi-metal, which is destroyed by magnetic field through a cascade of field-induced transitions. Above 40 T, URu${}_2$Si${}_2$ appears to be a polarized heavy fermions metal with a large density of carriers whose effective mass rapidly decreases with increasing magnetic polarization.

published version

References in corpus (6)

• Exotic Superconducting Properties in the Electron-Hole Compensated Heavy Fermion `Semimetal' URu2Si2
• Gapped itinerant spin excitations account for missing entropy in the hidden order state of URu${}_2$Si${}_2$
• Nernst effect in semi-metals: the meritorious heaviness of electrons
• Interplay between SDW and induced local moments in URu2Si2
• Mean Field study of the heavy fermion metamagnetic transition
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Cited by in corpus (5)

• High-field metamagnetism in the antiferromagnet CeRh${}_2$Si${}_2$
• Hall effect in heavy-fermion metals
• Critical point for Bose-Einstein condensation of excitons in graphite
• Spin-orbit density wave: A new phase of matter applicable to the hidden order state of URu2Si2
• Collinear antiferromagnetic order in URu${}_2$Si${}_{2-x}$P${}_x$ revealed by neutron diffraction