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

M. H. Hamidian, S. D. Edkins, Chung Koo Kim, J. C. Davis, A. P. Mackenzie, H. Eisaki, S. Uchida, M. J. Lawler, E. A. Kim, S. Sachdev, K. Fujita

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

Research 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 factor (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 visualization 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 φ 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.

Original languageEnglish
Pages (from-to)150-156
Number of pages7
JournalNature Physics
Volume12
Issue number2
DOIs
StatePublished - 2 Feb 2016

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