Model for the neutron resonance in HgBa2CuO4+δ

2017/03/13 by X. Montiel, C. Pépin · 2 citations
Engineering · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Cuprate #Inelastic neutron scattering #Neutron #Neutron scattering #Physics #Physics of Superconductivity and Magnetism #Pseudogap #Quantum mechanics #Superconducting Materials and Applications #Superconductivity #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.96.094529

published as Phys. Rev. B 96, 094529 (2017)

arxiv created 2017/03/13 · openalex created_date 2017/03/23 · openalex publication_date 2017/09/27 · arxiv updated 2017/10/03 · openalex updated_date 2026/08/05

Abstract

We study the spin dynamics of the resonant excitonic state (RES) proposed, within the theory of an emergent SU(2) symmetry, to explain some properties of the pseudogap phase of cuprate superconductors. The RES can be described as a proliferation of particle-hole patches with an internal modulated structure. We model the RES modes as a charge order with multiple 2p_F ordering vectors, where 2p_F connects two opposite sides of the Fermi surface. This simple modelization enables us to propose a comprehensive study of the collective mode observed at the antiferromagnetic wave vector Q=(\ensuremathπ,\ensuremathπ) by inelastic neutron scattering in both the superconducting state and also in the pseudogap regime. In this regime, we show that the dynamic spin susceptibility exhibits a loss of coherence terms except at special wave vectors commensurate with the lattice. We argue that this phenomenon could explain the change of the spin response shape around Q. We demonstrate that the hole dependence of the RES spin dynamics is in agreement with the experimental data in HgBa₂CuO_4+\ensuremathδ.

Citations

• Neutron resonance in high-Tcsuperconductors is not the π particle
• Electronic Raman scattering inYBa2Cu3O7sand other superconducting cuprates
• Renormalized mean-field theory of neutron scattering in cuprate superconductors
• SO(5)theory of antiferromagnetism and superconductivity
• Two energy scales in the spin excitations of the high-temperature superconductor La2−xSrxCuO4
• The electronic nature of high temperature cuprate superconductors
• The resonant magnetic mode: A common feature of high-Tc superconductors
• In-plane anisotropy of spin excitations in the normal and superconducting states of underdoped YBa₂Cu₃O_6+x
• Ordering, metastability and phase transitions in two-dimensional systems
• Quantum magnetic excitations from stripes in copper oxide superconductors

Cited by

• Fluctuations and the Higgs Mechanism in Underdoped Cuprates
• Odd-frequency pair density wave correlations in underdoped cuprates