2004/04/30 by K. Kodama, Koichi Kodama, Shin Miyahara +11
Physics and Astronomy · #Advanced Condensed Matter Physics #Atomic and Subatomic Physics Research #Physics of Superconductivity and Magnetism #cond-mat.stat-mech #cond-mat.str-el
paper · pdf · doi:10.1088/0953-8984/17/4/l02
published as J. Phys.: Condens. Matter vol.17 (2005) L61-L68 · 8 pages, 5 figures, published version
openalex publication_date 2005/01/15 · arxiv created 2005/01/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We observed a field-induced staggered magnetization in the 2D frustrated dimer singlet spin system SrCu 2 (BO 3 ) 2 by 11 B NMR, from which the magnitudes of the intradimer Dzyaloshinsky–Moriya interaction and the staggered g -tensor were determined. These anisotropic interactions cause singlet–triplet mixing and eliminate a quantum phase transition at the expected critical field H c for gap closing. They provide a quantitative account for some puzzling phenomena such as the onset of a uniform magnetization below H c and the persistence of the excitation gap above H c . The gap was accurately determined from the activation energy of the nuclear relaxation rate.