Unconventional quantum vortex matter state hosts quantum oscillations in the underdoped high-temperature cuprate superconductors.
Taylor, Sofia V
Le Tacon, Matthieu
Proceedings of the National Academy of Sciences of the United States of America
National Academy of Sciences
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Hsu, Y., Hartstein, M., Davies, A., Hickey, A. J., Chan, M. K., Porras, J., Loew, T., et al. (2021). Unconventional quantum vortex matter state hosts quantum oscillations in the underdoped high-temperature cuprate superconductors.. Proceedings of the National Academy of Sciences of the United States of America, 118 (7)https://doi.org/10.1073/pnas.2021216118
A central question in the underdoped cuprates pertains to the nature of the pseudogap ground state. A conventional metallic ground state of the pseudogap region has been argued to host quantum oscillations upon destruction of the superconducting order parameter by modest magnetic fields. Here we use low applied measurement currents and millikelvin temperatures on ultra-pure single crystals of underdoped YBa2Cu3O6+x to unearth an unconventional quantum vortex matter ground state characterized by vanishing electrical resistivity, magnetic hysteresis, and non-ohmic electrical transport characteristics beyond the highest laboratory accessible static fields. A new model of the pseudogap ground state is now required to explain quantum oscillations that are hosted by the bulk quantum vortex matter state without experiencing sizeable additional damping in the presence of a large maximum superconducting gap; possibilities include a pair density wave.
Royal Society Winton Programme for the Physics of Sustainability Engineering and Physical Sciences Research Council (EPSRC; studentship and grant numbers EP/R513180/1, EP/M506485/1 and EP/P024947/1) European Research Council under the European Unions Seventh Framework Programme (Grant Agreement numbers 337425 and 772891). EPSRC Strategic Equipment Grant EP/M000524/1 Leverhulme Trust by way of the award of a Philip Leverhulme Prize. National Key Research and Development Program of China (grant no. 2016YFA0401704). Work performed at the National High Magnetic Field Laboratory (NHMFL) supported by NSF Cooperative Agreement DMR-1157490, the State of Florida, and the Department of Energy (DOE) DOE Basic Energy Sciences project: ‘Science of 100 tesla’.
Royal Society (uf080702)
European Research Council (337425)
Royal Society (uf130463)
Leverhulme Trust (PLP-2015-271)
European Commission Horizon 2020 (H2020) ERC (772891)
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External DOI: https://doi.org/10.1073/pnas.2021216118
This record's URL: https://www.repository.cam.ac.uk/handle/1810/317115
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