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On the Temperature Behaviour of DC Conductivity in One‐Dimensional Conductors above T c
Author(s) -
Dieterich K.,
Wagner M.
Publication year - 1985
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.2221270234
Subject(s) - condensed matter physics , peierls transition , conductivity , thermal conduction , electrical conductor , anomaly (physics) , relaxation (psychology) , electrical resistivity and conductivity , work (physics) , physics , materials science , thermodynamics , quantum mechanics , psychology , social psychology
An ab‐initio single particle theory is presented for the temperature behaviour of electrical transport in one‐dimensional conductors. The calculation of the conductivity is based on a Kubo‐Moriformalism. The Kohn mode‐softening near the Peierls temperature is taken into consideration in a new approximation step for the calculation of the relaxation time, which is beyond a mean field calculation. For temperatures sufficiently above T c the T −1 law of the semiphenomenological earlier calculations is obtained, whereas close to the Peierls temperature a high maximum caused by the Kohn anomaly is found. This conductivity peak depends very sensibly on the quotient of the Debye temperature and the Peierls transition temperature. The calculation permits the suggestion that in the commensurate phase at high pressure single particle excitations provide the dominant conduction path far above T c .