Collective spin resonance excitation in the gapped itinerant multipole hidden order phase of URu2Si2
arXiv:1509.01458 · doi:10.1103/PhysRevB.92.094512
Abstract
An attractive proposal for the hidden order (HO) in the heavy electron compound URu2Si2 is an itinerant multipole order of high rank. It is due to the pairing of electrons and holes centered on zone center and boundary, respectively in states that have maximally different total angular momentum components. Due to the pairing with commensurate zone boundary ordering vector the translational symmetry is broken and a HO quasiparticle gap opens below the transition temperature T_HO. Inelastic neutron scattering (INS) has demonstrated that for T<T_HO the collective magnetic response is dominated by a sharp spin exciton resonance at the ordering vector Q that is reminiscent of spin exciton modes found inside the gap of unconventional superconductors and Kondo insulators. We use an effective two-orbital tight binding model incorporating the crystalline electric field effect to derive closed expressions for quasiparticle bands reconstructed by the multipolar pairing terms. We show that the magnetic response calculated within that model exhibits the salient features of the resonance found in INS. We also use the calculated dynamical susceptibility to explain the low temperature NMR relaxation rate.
13 pages, 8 figures
References in corpus (20)
- Rotational Symmetry Breaking in the Hidden-Order Phase of URu2Si2
- Magnetically driven superconductivity in CeCu2Si2
- Emergent Rank-5 'Nematic' Order in URu2Si2
- Evidence for broken time-reversal symmetry in the superconducting phase of URuSi
- Feedback spin resonance in superconducting CeCuSi and CeCoIn
- Photoemission Imaging of 3D Fermi Surface Pairing at the Hidden Order Transition in URu2Si2
- Direct observation of lattice symmetry breaking at the hidden-order transition in URu2Si2
- Cyclotron Resonance in the Hidden-Order Phase of URu2Si2
- Hidden and antiferromagnetic order as a rank-5 superspin in URu2Si2
- The crystalline electric field as a probe for long range antiferromagnetic order and superconductivity in CeFeAsOF
- Symmetry and correlations underlying Hidden Order in URu2Si2
- Theory of Spin Exciton in the Kondo Semiconductor
- Theory of induced quadrupolar order in tetragonal YbRu_{2}Ge_{2}
- Spin Exciton Formation inside the Hidden Order Phase of CeB6
- Neutron scattering studies on URu2Si2
- Broken symmetries in URu2Si2
- High-Field Fermi Surface Properties in the Low Carrier Heavy Fermion Compound URu2Si2
- Field induced spin exciton doublet splitting in d_{x^2-y^2}-wave 115-heavy electron superconductors
- Bound state of 4-excitation and magnetic resonance in unconventional superconductors
- Hidden order symmetry and superconductivity in URu2Si2 investigated by quasiparticle interference