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Anisotropy Investigations by Electrical Potential Measurements on Surfaces of P‐ and As‐TCNQ Single Crystals
Author(s) -
Zosel D.,
Ritschel H.,
Hänsel H.
Publication year - 1970
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19700380116
Subject(s) - tetracyanoquinodimethane , equipotential , anisotropy , crystal (programming language) , condensed matter physics , electrical resistivity and conductivity , plane (geometry) , materials science , single crystal , electrical resistance and conductance , electrode , optics , chemistry , crystallography , geometry , physics , mathematics , composite material , quantum mechanics , molecule , computer science , programming language , organic chemistry
A one‐probe measuring method has been used for electrical potential measurements on different planes of naturally grown single crystals of triphenylmethylphosphonium 7, 7, 8, 8‐tetracyanoquinodimethane (P‐TCNQ) and triphenylmethylarsonium 7, 7, 8, 8‐tetracyanoquinodimethane (As‐TCNQ). Potential distributions which result from using pairs of circular and straight plate electrodes in different arrangements on the crystal planes have been investigated. The explanation and description of the measured plots of the equipotential lines with a model is possible in a simple way for the (100) plane by using an anisotropic resistance net because in this case it is possible to reduce the three‐dimensional potential problem to a plane one. The electrical potential measurements give another contribution to the explanation of the interrelations between the crystal structure and anisotropic electrical properties of P‐ and As‐TCNQ.