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14 April 2021
  » arxiv » cond-mat/9905219

 Article overview

The pseudogap in high-temperature superconductors: an experimental survey
T. Timusk ; B.W. Statt ;
Rating Members: 3.5/5 (1 reader) | Visitors: 4.5/5 (4 visitors)
Date 14 May 1999
Journal Rep. Prog. Phys. 62 (1999) 61-122
Subject Superconductivity | cond-mat.supr-con
AffiliationMcMaster U., U. of Toronto
AbstractWe present an experimental review of the nature of the pseudogap in the cuprate superconductors. Evidence from various experimental techniques points to a common phenomenology. The pseudogap is seen in all high temperature superconductors and there is general agreement on the temperature and doping range where it exists. It is also becoming clear that the superconducting gap emerges from the normal state pseudogap. The d-wave nature of the order parameter holds for both the superconducting gap and the pseudogap. Although an extensive body of evidence is reviewed, a consensus on the origin of the pseudogap is as lacking as it is for the mechanism underlying high temperature superconductivity.
Source arXiv, cond-mat/9905219
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1 review found:
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1. review 05110033 (3 readers)    * Rate this comment.
Review title: Very good experimental review on the pseudogap in high Tc cuprates.
Reviewer: reviewer101
Date: 10 November 2005 at 02:12 GMT.
Comment: This article review cover many experimental aspects of the pseudogap (=partial gap in the electronic density of states). After a short introduction, the main topics are Angle Resolved Photoemission (ARPES) Tunneling Spectroscopy, Nuclear Magnetic Resonance (NMR), transport properties specific heat, Raman and Magnetic Neutron Scattering.

The d-wave nature of the pseudogap and the superconducting gap is well shown. The review shows clearly that the pseudogap is not an experimental artefact but a common feature to many high Tc superconductors.

It would be nice to have an actualized version of this review including other experimental methods like Nernst effect (Wang et al, cond-mat/0108242) or Hall effect (Matthey et al, cond-mat/0104328 where it seems that an additional crossover temperature T_n or T` is present between the critical temperature Tc and the pseudogap temperature T*. This should help to clarify the problem of the phase diagram of high Tc cuprates (Is the phase diagram compatible with a quantum critical point? etc). And, maybe, a more extended theoretical section with all major approaches could be included as well.

Note: there is a small mistakes in the text of figure 39. The YBCO oxygen doping should be written O_{6+x} in order to match with figure legends and not O_{7-\delta}. x=0.76 is the correct value for the underdoped regime.

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