학술논문
Nernst effect from fluctuating pairs in the pseudogap phase of the cuprates.
Document Type
Article
Author
Source
Subject
*SUPERCONDUCTIVITY
*TRANSITION temperature
*SEMICONDUCTORS -- Fluctuations
*COPPER ions
*FERMI surfaces
*PHYSICS
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Language
ISSN
1098-0121
Abstract
The observation of a large Nernst signal in cuprates above the superconducting transition temperature has attracted much attention. A potential explanation is that it originates from superconducting fluctuations. Although the Nernst signal is indeed consistent with Gaussian fluctuations for overdoped cuprates, Gaussian theory fails to describe the temperature dependence seen for underdoped cuprates. Here, we consider the vertex correction to Gaussian theory resulting from the pseudogap. This yields a Nernst signal in good agreement with the data. [ABSTRACT FROM AUTHOR]