2-7 June 2019
Simon Fraser University
America/Vancouver timezone
Welcome to the 2019 CAP Congress Program website! / Bienvenue au siteweb du programme du Congrès de l'ACP 2019 !

Exploring the pseudogap critical point of cuprate superconductors

4 Jun 2019, 14:15
30m
BLU 10011 (Simon Fraser University)

BLU 10011

Simon Fraser University

Invited Speaker / Conférencier(ère) invité(e) Symposia Day - Quantum Materials T3-5 Superconductivity (DCMMP) | Supraconductivité (DPMCM)

Speaker

Nicolas Doiron-Leyraud (Institut Quantique, Université de Sherbrooke)

Description

Unexplained to this day, the mysterious pseudogap phase of cuprate high-temperature superconductors is one of their key defining universal properties. Many scenarios have been proposed for its origin, but none has provided a satisfactory description so far. Part of the problem stems from the absence of a clear and sharp signature of the pseudogap at low temperatures in the vicinity of its critical point at p. Here I will discuss our recent transport and thermodynamic measurements on a range of cuprate materials, which show that p is a quantum critical point. I will also show that hydrostatic pressure can be used as a tuning parameter for p* in Nd-LSCO, which puts constraints on theories of the pseudogap. Finally, I will mention very recent thermal Hall effect measurements that reveal a giant effect specific to the pseudogap phase and which seem to arise from neutral excitations.

Primary author

Nicolas Doiron-Leyraud (Institut Quantique, Université de Sherbrooke)

Co-authors

S. Badoux (Département de Physique & Institut Quantique, Université de Sherbrooke) F Laliberté (Département de Physique & Institut Quantique, Université de Sherbrooke) C. Collignon (Département de Physique & Institut Quantique, Université de Sherbrooke) G. Grissonanche (Département de Physique & Institut Quantique, Université de Sherbrooke) E Lefrançois (Département de Physique & Institut Quantique, Université de Sherbrooke) B. Michon (Département de Physique & Institut Quantique, Université de Sherbrooke) A. Gorgout (Département de Physique & Institut Quantique, Université de Sherbrooke) A. Ataei (Département de Physique & Institut Quantique, Université de Sherbrooke) L. Taillefer (Département de Physique & Institut Quantique, Université de Sherbrooke) C. Proust (Laboratoire National des Champs Magnétiques Intenses (CNRS, EMFL, INSA, UGA, UPS)) C. Marcenat (Univ. Grenoble Alpes, CEA, INAC, PHELIQS, LATEQS) T. Klein (CNRS, Institut Néel)

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