Electronic properties of a heavy-fermion U(Ru0.92Rh0.08)(2)Si-2 single crystal

Article

关键词: HIDDEN ORDER;    ELECTRICAL-RESISTIVITY;    NEUTRON-SCATTERING;    TRANSITION;    URU2SI2;    STATE;    PRESSURE;    GROWTH;    MOMENT;    SYSTEM;   

DOI  :  10.1103/PhysRevB.95.035138

来源: SCIE

【 摘 要 】

We report the crystal structure and highly anisotropic magnetic, transport, and thermal properties of an exceptionally good single crystal of U(Ru0.92Rh0.08)(2)Si-2, prepared using a modified Czochralski method. Our study, that also includes neutron diffraction results, shows all the heavy-fermion signatures of pristine URu2Si2; (h)owever, the superconductivity, hidden order, and remnant weak antiferromagnetic orders are absent. Instead, the ground state of the doped system can be classified as a spin liquid that preserves the heavy-fermion character. U(Ru0.92Rh0.08)(2)Si-2 exhibits a short-range magnetic order distinguished by reflections of a Lorentzian profile at q(III) = (1/2 1/2 1/2) positions that disappear above similar to 15 K. The short-range order seems to be a precursor of a long-range magnetic order that occurs with higher Rh concentration. We indicate that these short-range fluctuations involve, at least partially, inelastic scattering processes.

【 授权许可】

Free