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Pinning effect in peierls impurity systems with deviation from half-filling of the energy band

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Abstract

A study is made of the effect of deviation from half-filling of the energy band (μ≠0) on the Fröhlich collective mode in onedimensional impurity systems. A low impurity concentration is considered, and the infinite series of impurity scattering is taken into account self-consistently in the determination of the collective mode Green's function. The conductivity σ(ω) is found in terms of this Green's function, and an analytic expression is obtained for σ(ω) at ω∼ω T (ω T is the pinning frequency). It is shown that for the ratio Re(σ(ω)/σmax) a universal formula arises. It differs from the results of Kurihara in the expression for ω T , which contains an essential dependence on μ in the incommensurate state of the charge density wave. It is also shown that the width of the peak in the dependence σ(ω) and its position increase with increasing μ.

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Authors
  1. M. E. Palistrant
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Additional information

Institute of Applied Physics, Moldovan Academy of Sciences. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 101, No. 1, pp. 110–122, October, 1994.

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Palistrant, M.E. Pinning effect in peierls impurity systems with deviation from half-filling of the energy band. Theor Math Phys 101, 1235–1244 (1994). https://doi.org/10.1007/BF01079261

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  • DOI: https://doi.org/10.1007/BF01079261

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