Abstract
Coexisting fluctuations towards various ordered states are ubiquitous in strongly correlated electronic systems. In particular, measurements of underdoped cuprate high-temperature superconductors reveal evidence for short-range charge order in parallel to large superconducting fluctuations. Here we use a nonlinear sigma model to describe a system with N competing orders, and calculate its transverse thermoelectric transport coefficient in the analytically tractable limit of large N. Our results, which determine the contribution of order-parameter fluctuations to the Nernst signal, are appropriate for high temperatures in the case of finite N. They are similar to previously obtained results within a model of Gaussian superconducting fluctuations, but also indicate that the Nernst signal increases when the charge order fluctuations are suppressed.
Original language | American English |
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Article number | 224506 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 90 |
Issue number | 22 |
DOIs | |
State | Published - 5 Dec 2014 |
Bibliographical note
Publisher Copyright:© 2014 American Physical Society.