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Pseudogap temperature T* of cuprate superconductors from the Nernst effect

TitlePseudogap temperature T* of cuprate superconductors from the Nernst effect
Publication TypeJournal Article
Year of Publication2018
AuthorsCyr-Choiniere, O, Daou, R, Laliberte, F, Collignon, C, Badoux, S, LeBoeuf, D, Chang, J, Ramshaw, BJ, Bonn, DA, Hardy, WN, Liang, R, Yan, JQ, Cheng, JG, Zhou, JS, Goodenough, JB, Pyon, S, Takayama, T, Takagi, H, Doiron-Leyraud, N, Taillefer, L
JournalPhysical Review B
Date Published02
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000423989000003
Keywordsantiferromagnetic order, bi2sr2cacu2o8+delta, c, charge-stripe order, fermi-surface, physics, quantum oscillations, quasi-particle states, single-crystals, superconductor, transition-temperature, underdoped, upper critical-field

0) similar or equal to T-N(0), the Neel temperature for the onset of antiferromagnetic order at p = 0, suggesting that there is a link between pseudogap and antiferromagnetism. With increasing p, T-star(p) extrapolates linearly to zero at p similar or equal to p(c2,) the critical doping belowwhich superconductivity emerges at high doping, suggesting that the conditions which favor pseudogap formation also favor pairing. We also use the Nernst effect to investigate how far superconducting fluctuations extend above the critical temperature T-c, as a function of doping, and find that a narrow fluctuation regime tracks T-c, and not T-star. This confirms that the pseudogap phase is not a form of precursor superconductivity, and fluctuations in the phase of the superconducting order parameter are not what causes T-c to fall on the underdoped side of the T-c dome.

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