An alternative explanation of the broad conductivity maxima of metalic TCNQ salts obstained from acetonitrile solution

Ashwell, Geoffrey J.; Sandy, Ian M.; Chyla, A.; Cross, Graham H.

doi:10.1016/0379-6779(87)90398-5

Cited by 2 publications

(1 citation statement)

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“…Kamras [39] and others have explained the observed phase transitions on the basis of the effect of impurities. However, it may mention here that transitions obtained in many such cases may be due to the incorporation of acetonitrile molecules in the lattice, used as a solvent for the synthesis of samples [53].…”

Section: Multi Phasesmentioning

confidence: 99%

High Electrical Conductivity and Conspicuous Phase Transitions in Single Crystals of K-TCNQ

Singh¹

2017

AMPC

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This paper is to report the temperature dependent electrical conductivity of single crystals of radical ion salt (RIS) potassium-TCNQ (K-tetracyanoquinodimethane) in a wide range of temperatures from 30 to 500 K. This RIS is quasi-one-dimensional in nature. These single crystals of K-TCNQ are grown by different methods like electrochemical, solution growth and diffusion method. Activation energy is determined for the sample in different temperature regions and found different values. More than one semiconductor to metal phase transition is observed in the studied samples during electrical measurements below and above room temperature. All the features observed in the studied samples are analyzed in the framework of their molecular structure as well as under different effects like disorder, impurity, Coulomb interaction, charge density wave (CDW), scattering and 3-D effects etc.

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Section: Multi Phasesmentioning

confidence: 99%