NDLI: Metallic transport, magnetic susceptibility and reflectance spectra in heavily doped PPY(PF/sub 6/)

Content Provider	IEEE Xplore Digital Library
Author	Yoon, C.O. Reghu, M. Moses, D. Sariciftci, N.S. Lee, K. Heeger, A.J.
Copyright Year	1994
Description	Author affiliation: University of California at Santa Barbara (Yoon, C.O.)
Abstract	Summary form only given. We summarize some metallic features observed in heavily doped polypyrrole-hexafluorophosphate, PPy(PF/sub 6/). Measurements of the conductivity, thermoelectric power, electron spin resonance (ESR) and optical reflectance are carried out for the electroclunically prepared sample at low temperature (-40/spl deg/C), with the characteristic resistivity ratio P/sub r/=P(1.4K)/P(300K)=l.8. The sample shows a positive temperature coefficient of the resistivity (TCR) at temperatures below T/spl ap/15K. The thermoelectric power (S) increases linearly in proportion to the temperature, with S /spl ap/ 7 /spl mu/V/K at room temperature. High reflectance in far IR as well as a plasma resonance around 1.7 eV were observed in reflectance measurement. The temperature independent paramagnetic susceptibility down to 50K also confirms the existence of finite density of states at Fermi level. The results suggest that the electronic structure of PPy(PF/sub 6/) is characteristic of a disordered metal.
Starting Page	69
Ending Page	69
File Size	82597
Page Count	1
File Format	PDF
DOI	10.1109/STSM.1994.834752
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-07-24
Publisher Place	Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Reflectivity Paramagnetic resonance Doping Conductivity Plasma measurements Plasma temperature Thermoelectricity Magnetic susceptibility Optical polymers Magnetic properties
Content Type	Text
Resource Type	Article

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