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15 April 2021
  » arxiv » cond-mat/0105202

 Article overview

The electronic specific heat in the pairing pseudogap regime
C. P. Moca ; B. Janko ;
Rating Members: 2.66/5 (1 reader)
Date 9 May 2001
Subject Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el
AbstractWhen pairing correlations in a quasi two dimensional electron system induce a pseudogap in the single particle density of states, the specific heat must also contain a sizeable pair contribution. The theoretically calculated specific heat for such a system is compared to the experimental results of Loram and his collaborators for underdoped YBa_2Cu_3O_{6+x} and La_{2-x}Sr_{x}CuO_4 samples. The size and doping dependence of the extracted pseudogap energy scale for both materials is comparable to the values obtained from a variety of other experiments.
Source arXiv, cond-mat/0105202
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1 review found:
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1. review 05090030 (3 readers)    * Rate this comment.
Review title: is it possible to consider the phase transition together with the pseudogap?
Reviewer: reviewer20
Date: 29 September 2005 at 13:12 GMT.
Comment: The most interesting thing in this article is the fact that electronic specific heat from single particles cannot reproduce the wide hump between Tc and T*. The hump can be reproduced very well by a pairing contribution. The doping dependence is correct when fitting experiments. However, the main problem is that there is no superconducting phase transition at Tc. The sharp peak at Tc is not reproduced.

Maybe this model could be improved by introducing considering the phase transition together with pairing fluctuations.

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