Fragile charge order in the non-superconducting ground state of the underdoped high temperature superconductors
Proceedings of the National Academy of Sciences
National Academy of Sciences
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Tan, B., Harrison, N., Zhu, Z., Balakirev, F., Ramshaw, B., Srivastava, A., Sabok, S., et al. (2015). Fragile charge order in the non-superconducting ground state of the underdoped high temperature superconductors. Proceedings of the National Academy of Sciences, 112 (31), 9568-9572. https://doi.org/10.1073/pnas.1504164112
The normal state in the hole underdoped copper oxide superconductors has proven to be a source of mystery for decades. The measurement of a small Fermi surface by quantum oscillations on suppression of superconductivity by high applied magnetic fields, together with complementary spectroscopic measurements in the hole under- doped copper oxide superconductors, reveals a nodal electron pocket from charge or- der in YBa_2Cu_3O_6_+_d. Here we report quantum oscillation measurements in the closely related stoichiometric material YBa_2Cu_4O_8, which reveal similar Fermi surface prop- erties to YBa_2Cu_3O_6_+_d, despite an absence of charge order signatures in the same spectroscopic techniques such as x-ray diffraction that revealed signatures of charge order in YBa_2Cu_3O_6_+_d. Fermi surface reconstruction in YBa_2Cu_4O_8 is suggested to occur from magnetic field enhancement of charge order that is rendered fragile in zero magnetic fields due to its potential unconventional symmetry, and/or its occurring as a subsidiary to more robust underlying electronic correlations.
B.T., A.S, and S.E.S. acknowledge support from the Royal Society, the Winton Programme for the Physics of Sustainability, and the European Research Council under the European Unions Seventh Framework Programme (grant number FP/2007-2013)/ ERC Grant Agreement number 337425. N.H., Z.Z., F.F.B., and B.J.R. acknowl- edge support for high-magnetic-field experiments from the US Department of Energy, Office of Science, BES- MSE `Science of 100 Tesla' programme. G.G.L. acknowl- edges support from EPSRC grant EP/K012894/1. Work at NIU was supported by The Institute for Nanoscience, Engineering, and Technology - InSET. A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by NSF co-operative agreement number DMR-0654118, the state of Florida, and the DOE. We are grateful for the experimental assis- tance provided by National High Magnetic Field Labora- tory personnel, including J. B. Betts, Y. Coulter, M. Gor- don, C. H. Mielke, A. Parish, R. McDonald, D. Rickel, and D. Roybal.
European Research Council (337425)
External DOI: https://doi.org/10.1073/pnas.1504164112
This record's URL: https://www.repository.cam.ac.uk/handle/1810/248063