2009/05/15 by Maxime Dion, David Fournier, D. Fournier +6
Chemistry · Materials Science · Mathematics · Physics and Astronomy · #Chemistry #Classification of discontinuities #Condensed matter physics #Crystal structure #Crystallography #Geometry #Magnetism in coordination complexes #Mathematical analysis #Mathematics #Order (exchange) #Organic and Molecular Conductors Research #Orthorhombic crystal system #Pairing #Physics #Physics of Superconductivity and Magnetism #Superconductivity #Symmetry (geometry) #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.80.220511
published as Phys. Rev. B 80, 220511 (2009) · 5 pages, LaTeX,3 figures
arxiv created 2009/05/15 · openalex publication_date 2009/12/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Discontinuities in elastic constants are detected at the superconducting transition of layered organic conductors \ensuremathκ\text\ensuremath-(BEDT-TTF)2X by longitudinal and transverse ultrasonic velocity measurements. Symmetry arguments show that discontinuities in shear elastic constants can be explained in the orthorhombic compound only if the superconducting order parameter has a mixed character that can be of two types, either A1g+B1g or B2g+B3g in the classification of irreducible representations of the orthorhombic point group D2h. Consistency with other measurements suggests that the A1g+B1g(dxy+dz(x+y)) possibility is realized. Such clear symmetry-imposed signatures of mixed order parameters have not been observed in other superconducting compounds.