1. Onset field for Fermi-surface reconstruction in the cuprate superconductor YBCO
- Author
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Grissonnanche, G., Laliberte, F., Dufour-Beausejour, S., Riopel, A., Badoux, S., Caouette-Mansour, M., Matusiak, M., Juneau-Fecteau, A., Bourgeois-Hope, P., Cyr-Choiniere, O., Baglo, J. C., Ramshaw, B. J., Liang, R., Bonn, D. A., Hardy, W. N., Kramer, S., LeBoeuf, D., Graf, D., Doiron-Leyraud, N., and Taillefer, Louis
- Subjects
Condensed Matter - Superconductivity ,Condensed Matter - Strongly Correlated Electrons - Abstract
Quantum oscillations and negative Hall and Seebeck coefficients at low temperature and high magnetic field have shown the Fermi surface of underdoped cuprates to contain a small closed electron pocket. It is thought to result from a reconstruction by charge order, but whether it is the order seen by NMR and ultrasound above a threshold field or the short-range modulations seen by X-ray diffraction in zero field is unclear. Here we use measurements of the thermal Hall conductivity in YBCO to show that Fermi-surface reconstruction occurs only above a sharply defined onset field, equal to the transition field seen in ultrasound. This reveals that electrons do not experience long-range broken translational symmetry in the zero-field ground state, and hence in zero field there is no quantum critical point for the onset of charge order as a function of doping., Comment: 20 pages and 5 figures in Main text + 9 pages and 6 figures in Supplementary material
- Published
- 2015