Sign switching of dimer correlations in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>SrCu</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:msub><mml:mi>BO</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mo>)</mml:mo></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> under hydrostatic pressure
S. Bettler, L. Stoppel, Z. Yan, S. Gvasaliya, A. Zheludev
Abstract
Nearest neighbor spin correlations are the key to understanding pressure-induced phases of the quantum magnet SrCu${}_{2}$(BO${}_{3}$)${}_{2}$. The authors infer these from their effect on the frequency of a particular optical phonon, measured using Raman spectroscopy in a diamond-anvil pressure cell. At about 22 kbar they observe the correlations switch from antiferromagnetic to ferromagnetic.
Topics & Concepts
AntiferromagnetismCondensed matter physicsHydrostatic pressureRaman spectroscopySign (mathematics)DimerMaterials scienceQuantumPhysicsSpin (aerodynamics)Spectroscopyk-nearest neighbors algorithmMagnetHydrostatic equilibriumFerromagnetismRaman scatteringNuclear magnetic resonanceChemistryQuantum dotMolecular physicsCrystal Structures and PropertiesPhysics of Superconductivity and MagnetismAdvanced Condensed Matter Physics