1999/10/31 by Shuichi Murakami, Naoto Nagaosa · 3 citations
Materials Science · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Critical exponent #Exponent #Magnetic field #Magnetism in coordination complexes #Magnetization #Materials science #Molecule #Multicritical point #Organic and Molecular Conductors Research #Organic superconductor #Phase (matter) #Phase diagram #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconductivity #Tetrathiafulvalene #cond-mat.supr-con
paper · pdf · doi:10.1143/jpsj.69.2395
published as J.Phys.Soc.Jpn.69(2000)2395-2398 · 5 pages, REVTEX, 3 figures
arxiv created 2000/07/17 · openalex publication_date 2000/08/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study theoretically the multicritical phenomena of the superconductivity (SC) and antiferromagnetism (AF) in organic conductors κ-BEDT salts. The phase diagram and the experimental data on the NMR relaxation rate 1/T1 is analysed in terms of the renormalization group method. The bicritical phenomenon observed experimentally indicates the rotational symmetry, i.e., SO(5) symmetry, of the SC and the AF. The critical exponent x for the divergence of 1/T1 is well explained by x = ν (z - 1 - η) with the dynamical exponent z = 3/2 for the AF region while z = φ/ν ∼ 1.84 at the bicritical point. These results strongly suggest that the origin of the SC is in common with that of the AF and that its symmetry is d-wave.