title: Nernst effect and diamagnetism in phase fluctuating superconductors.
abstract: We study superconducting systems in the regime where superconductivity is destroyed by phase fluctuations. We find that the Nernst effect has a much sharper temperature decay than predicted by Gaussian fluctuations, with an onset temperature that tracks Tc rather than the pairing temperature. We find a close quantitative connection with diamagnetism--the ratio of magnetization to transverse thermoelectric conductivity reaches a fixed value at high temperatures. We interpret measurements on underdoped cuprates in terms of a dilute vortex liquid over a wide temperature range above Tc.
authors.affiliation: Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Podolsky
authors.forename: Srinivas
authors.initials: S
authors.lastname: Raghu
authors.forename: Ashvin
authors.initials: A
authors.lastname: Vishwanath