From Incommensurate Correlations to Mesoscopic Spin Resonance inYbRh2Si2

2012/07/18 by Christian Stock, C. Stock, C. Broholm +9
Materials Science · Physics and Astronomy · #Condensed matter physics #Energy (signal processing) #Excitation #Field (mathematics) #Intensity (physics) #Iron-based superconductors research #Magnetic field #Mesoscopic physics #Nuclear magnetic resonance #Optics #Physics #Physics of Superconductivity and Magnetism #Plane (geometry) #Quantum mechanics #Rare-earth and actinide compounds #Spin (aerodynamics) #cond-mat.mtrl-sci #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.109.127201

published as Phys. Rev. Lett. 109, 127201 (2012) · (main text - 4 pages, 4 figures; supplementary information - 3 pages, 3 figures; to be published in Physical Review Letters)

arxiv created 2012/07/18 · openalex publication_date 2012/09/17 · arxiv updated 2015/06/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Spin fluctuations are reported near the magnetic field---driven quantum critical point in YbRh₂Si₂. On cooling, ferromagnetic fluctuations evolve into incommensurate correlations located at q₀=\ifmmode±\else\textpm\fi(\ensuremathδ,\ensuremathδ), with \ensuremathδ=0.14\ifmmode±\else\textpm\fi0.04 r.l.u. At low temperatures, an in-plane magnetic field induces a sharp intradoublet resonant excitation at an energy E₀=g\ensuremathμ_B\ensuremathμ₀H with g=3.8\ifmmode±\else\textpm\fi0.2. The intensity is localized at the zone center, indicating precession of spin density extending \ensuremathξ=6\ifmmode±\else\textpm\fi2 \AA beyond the 4f site.

Citations

• The break-up of heavy electrons at a quantum critical point
• Spin Resonance in thed-Wave SuperconductorCeCoIn5
• Relevance of Ferromagnetic Correlations for the Electron Spin Resonance in Kondo Lattice Systems
• Fermi-liquid instabilities at magnetic quantum phase transitions
• Quantum critical phenomena
• Hall number inYbRh2Si2