Fluctuation Effects in Underdoped Cuprate Superconductors under Magnetic Field

Details Fluctuation Effects in Underdoped Cuprate Superconductors under Magnetic Field Fluctuation Effects in Underdoped Cuprate Superconductors under Magnetic Field

2002-03-11

arxiv.org/abs/cond-mat/0203221v3

Phys.Rev. B 66, 100511(R) (2002)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.66.100511

Fluctuation effects in underdoped cuprates under high fields are examined by trying to fit theoretical results to resistivity and Nernst data in vortex states. The superconducting (SC) fluctuation in underdoped cuprates includes not only the ordinary thermal contribution but also a large amount of quantum dynamical contributions. Together with this, the presence of a SC pseudogap region T_0-T_{c0} increasing with underdoping is found to be the origin of the Nernst coefficient becoming anomalously smaller and the in-plane coherence length {\it apparently} increasing with underdoping.

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