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Atomic-scale electronic structure of the cuprate d-symmetry form factor density wave state

MPG-Autoren
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Mackenzie,  A. P.
Andrew Mackenzie, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Hamidian, M. H., Edkins, S. D., Kim, C. K., Davis, J. C., Mackenzie, A. P., Eisaki, H., et al. (2016). Atomic-scale electronic structure of the cuprate d-symmetry form factor density wave state. Nature Physics, 12(2), 150-156. doi:10.1038/NPHYS3519.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0029-C6D0-D
Zusammenfassung
Research on high-temperature superconducting cuprates is at present focused on identifying the relationship between the classic ` pseudogap' phenomenon(1,2) and the more recently investigated density wave state(3-13). This state is generally characterized by a wavevector Q parallel to the planar Cu-O-Cu bonds(4-13) along with a predominantly d-symmetry form factor(14-16) (dFF-DW). To identify the microscopic mechanism giving rise to this state(17-29), 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 visualization(14) of electronic structure and reveal that the characteristic energy of the dFF-DW modulations is actually the 'pseudogap' energy Delta 1. Moreover, we demonstrate that the dFF-DW modulations at E = -Delta(1) (filled states) occur with relative phaseffcompared to those at E = -Delta(1) (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(30-32). 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.