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Rules for intrinsically (super) conducting polymers
Author(s) -
Aissing Gerrard,
Monkhorst Hendrik J.,
Hu Chengzheng
Publication year - 1993
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.560480826
Subject(s) - superconductivity , polymer , degeneracy (biology) , valence (chemistry) , nitride , condensed matter physics , materials science , topology (electrical circuits) , chemical physics , chemistry , theoretical physics , physics , nanotechnology , quantum mechanics , mathematics , combinatorics , organic chemistry , bioinformatics , layer (electronics) , biology
We propose a number of rules based on topological and structural considerations for the synthesis of intrinsically conducting polymeric materials. These rules can be summarized as follows: (i) The polymer has to have a glide plane or a twofold screw axis when infinitely extended; (ii) the unit cell must contain 4 N + 2 valence electrons; (iii) the packing into the solid is restricted by symmetry rules that conserve the twofold degeneracy caused by rule (i). These rules are necessary (but not sufficient) for superconductivity. The inorganic polymer poly(sulfur–nitride), which is a metallic superconductor with a critical temperature of T c = 0.33 K, is identified as a striking example of these rules. © 1993 John Wiley & Sons, Inc.