Incommensurate spin resonance in URu2Si2.

ORAL

Abstract

The nature of the hidden order (HO) in URu2Si2 below T$_{HO}$ = 17.5K has been a puzzle for a long time. Here we propose to search for the spin resonance as a tool to elucidate the nature of the HO. We consider inelastic neutron scattering in URu2Si2 and argue that a gap in the fermion spectrum will produce an incommensurate spin resonance at Q* = (1$\backslash $pm 0.4, 0,0) at $\omega _{res}$ = 4-6 meV. We assume that the HO gap is due to a particle-hole condensate that connects nested parts of the Fermi surface with nesting vector {\$}Q\^{}* . The predicted behavior of the spin susceptibility is strikingly similar to the phenomenology of resonance peaks in high-T{\_}c and heavy fermion superconductors. The energy of the resonance peak scales with T$_{HO}$ $\omega _{res} \quad \sim $ 4 k{\_}BT$_{HO}$

*This work was supprted by US DOE at LANL

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Authors

  • Jian-Xin Zhu

    • Theoretical Division, Los Alamos National Laboratory
    • Theoretical Division and CNLS, Los Alamos National Laboratory
    • LANL

  • Alexander Balatsky

    • Los Alamos National Laboratory
    • LANL

  • Athanasios Chantis

    • Theoretical Division, Los Alamos National Laboratory
    • LANL

  • Hari Dahal

    • Los Alamos National Laboratory
    • LANL

  • David Parker

    • Naval Research Laboratory
    • U.S. Naval Research Laboratory
    • NRL