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Structural Transition in the Quasi‐Two‐Dimensional Organic Superconductor κ‐(ET) 2 Cu[N(CN) 2 ]Br Studied by 13 C MAS NMR
Author(s) -
Deluzet André,
Mayaffre Hadrien,
Wzietek Pawel,
Sotta Paul,
Dumont Eric,
Jérome Denis
Publication year - 1998
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(199807)10:10<797::aid-adma797>3.0.co;2-#
Subject(s) - materials science , superconductivity , transition metal , crystallography , organic superconductor , inorganic chemistry , chemistry , condensed matter physics , physics , organic chemistry , catalysis
What influence does the non‐centrosymmetric anion ordering have on the low‐temperature electronic properties of superconducting charge transfer salts such as the title compound? To answer this question, high resolution 13 C magic angle spinning (MAS) NMR measurements were made in the temperature range 170–300 K. Following determination of the spin densities on central carbon sites at room temperature, evidence is presented for a possible small monoclinic distortion at low temperatures and an incommensurate transition at 170 K.