2002/03/21 by K. Kodama, Koichi Kodama, J. Yamazaki +7
Physics and Astronomy · #Advanced Condensed Matter Physics #Atomic and Subatomic Physics Research #Atomic physics #Condensed matter physics #Coupling (piping) #Dimer #Excited state #Ground state #Magnetic resonance imaging #Materials science #Molecular physics #Nuclear magnetic resonance #Physics #Physics of Superconductivity and Magnetism #Quadrupole #Resonance (particle physics) #Singlet state #Spin (aerodynamics) #Spin echo #Spin states #cond-mat.str-el
paper · pdf · doi:10.1088/0953-8984/14/17/101
published as J. Phys.:Condens. Matter 14 (2002) L319 · 7pages, 6 figures, submitted to J. Phys.:condens. matter
arxiv created 2002/03/21 · openalex publication_date 2002/04/18 · arxiv updated 2013/03/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report results of nuclear magnetic resonance experiments in SrCu 2 (BO 3 ) 2 , a quasi-two-dimensional spin system with a singlet ground state. When magnetic field is applied along the c -axis, each of the quadrupole-split Cu resonance lines splits further into four lines. The spin-echo intensity for some of the split lines oscillates against the separation time between π/2 and π rf pulses. These phenomena are due to strong nuclear spin-spin coupling mediated by the electronic spin system, which exists only within a pair of nuclei. Thus the results provide direct evidence for the dimer singlet ground state in this material.