Atomic-scale electronic structure of the cuprate d-symmetry form factor density wave state
Hamidian, M. H.
Edkins, S. D.
Kim, Chung Koo
Davis, J. C.
Mackenzie, A. P.
Lawler, M. J.
Fujita, K.Note: Order does not necessarily reflect citation order of authors.
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CitationHamidian, M. H., S. D. Edkins, Chung Koo Kim, J. C. Davis, A. P. Mackenzie, H. Eisaki, S. Uchida, et al. 2015. “Atomic-Scale Electronic Structure of the Cuprate d-Symmetry Form Factor Density Wave State.” Nature Physics 12 (2) (October 26): 150–156. doi:10.1038/nphys3519.
AbstractResearch on high-temperature superconducting cuprates is at present focused on identifying the relationship between the classic ‘pseudogap’ phenomenon and the more recently investigated density wave state. This state is generally characterized by a wavevector Q parallel to the planar Cu–O–Cu bonds along with a predominantly d-symmetry form facto (dFF-DW). To identify the microscopic mechanism giving rise to this state one must identify the momentum-space states contributing to the dFF-DW spectral weight, determine their particle–hole phase relationship about the Fermi energy, establish whether they exhibit a characteristic energy gap, and understand the evolution of all these phenomena throughout the phase diagram. Here we use energy-resolved sublattice visualization14 of electronic structure and reveal that the characteristic energy of the dFF-DW modulations is actually the ‘pseudogap’ energy Δ1. Moreover, we demonstrate that the dFF-DW modulations at E = −Δ1 (filled states) occur with relative phase π compared to those at E = Δ1 (empty states). Finally, we show that the conventionally defined dFF-DW Q corresponds to scattering between the ‘hot frontier’ regions of momentum-space beyond which Bogoliubov quasiparticles cease to exist. These data indicate that the cuprate dFF-DW state involves particle–hole interactions focused at the pseudogap energy scale and between the four pairs of ‘hot frontier’ regions in momentum space where the pseudogap opens.
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