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The Nernst effect in high-$T_c$ superconductors

Yayu Wang·Lu Li·N. P. Ong
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Abstract

The observation of a large Nernst signal $e_N$ in an extended region above the critical temperature $T_c$ in hole-doped cuprates provides evidence that vortex excitations survive above $T_c$. The results support the scenario that superfluidity vanishes because long-range phase coherence is destroyed by thermally-created vortices (in zero field), and that the pair condensate extends high into the pseudogap state in the underdoped (UD) regime. We present a series of measurements to high fields $H$ which provide strong evidence for this phase-disordering scenario.

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Yayu Wang, Lu Li, N. P. Ong. 2005-10-18. The Nernst effect in high-$T_c$ superconductors. https://doi.org/10.1103/physrevb.73.024510

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