期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 112, 期 31, 页码 9568-9572出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1504164112
关键词
superconductivity; strongly correlated electron systems; high-Tc cuprate superconductors; Fermi surface; charge order
资金
- Royal Society
- Winton Programme for the Physics of Sustainability
- European Research Council (ERC) under European Union Seventh Framework Programme Grant FP/ERC [337425]
- US Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES)-Materials Sciences and Engineering (MSE) Science of 100 Tesla Programme
- Engineering and Physical Sciences Research Council (EPSRC) [EP/K012894/1]
- Institute for Nanoscience, Engineering, and Technology
- National Science Foundation [DMR-0654118]
- State of Florida
- DOE
- Engineering and Physical Sciences Research Council [EP/K012894/1] Funding Source: researchfish
- EPSRC [EP/K012894/1] Funding Source: UKRI
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 underdoped copper oxide superconductors, point to a nodal electron pocket from charge order in YBa2Cu3O6+delta. Here, we report quantum oscillation measurements in the closely related stoichiometric material YBa2Cu4O8, which reveals similar Fermi surface properties to YBa2Cu3O6+delta, despite the nonobservation of charge order signatures in the same spectroscopic techniques, such as X-ray diffraction, that revealed signatures of charge order in YBa2Cu3O6+delta. Fermi surface reconstruction in YBa2Cu4O8 is suggested to occur from magnetic field enhancement of charge order that is rendered fragile in zero magnetic fields because of its potential unconventional nature and/or its occurrence as a subsidiary to more robust underlying electronic correlations.
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