期刊
NATURE COMMUNICATIONS
卷 7, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms12244
关键词
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资金
- US Department of Energy BES 'Science at 100T' [LANLF100]
- National Science Foundation [DMR-1157490]
- State of Florida
- U.S. Department of Energy
- Department of Energy, Office of Basic Energy Sciences [DE-SC0006858]
- FWF project [P2798]
- U.S. Department of Energy (DOE) [DE-SC0006858] Funding Source: U.S. Department of Energy (DOE)
- Austrian Science Fund (FWF) [P27980] Funding Source: Austrian Science Fund (FWF)
The observation of a reconstructed Fermi surface via quantum oscillations in hole-doped cuprates opened a path towards identifying broken symmetry states in the pseudogap regime. However, such an identification has remained inconclusive due to the multi-frequency quantum oscillation spectra and complications accounting for bilayer effects in most studies. We overcome these impediments with high-resolution measurements on the structurally simpler cuprate HgBa2CuO4+delta (Hg1201), which features one CuO2 plane per primitive unit cell. We find only a single oscillatory component with no signatures of magnetic breakdown tunnelling to additional orbits. Therefore, the Fermi surface comprises a single quasi-two-dimensional pocket. Quantitative modelling of these results indicates that a biaxial charge density wave within each CuO2 plane is responsible for the reconstruction and rules out crisscrossed charge stripes between layers as a viable alternative in Hg1201. Lastly, we determine that the characteristic gap between reconstructed pockets is a significant fraction of the pseudogap energy.
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