Giant Phonon Anomaly associated with Superconducting Fluctuations in the Pseudogap Phase of Cuprates

Abstract

The opening of the pseudogap in underdoped cuprates breaks up the Fermi surface, which may lead to a breakup of the d-wave order parameter into two subband amplitudes and a low energy Leggett mode due to phase fluctuations between them. This causes a large increase in the temperature range of superconducting fluctuations with an overdamped Leggett mode. Almost resonant scattering of inter-subband phonons to a state with a pair of Leggett modes causes anomalously strong damping. In the ordered state, the Leggett mode develops a finite energy, suppressing the anomalous phonon damping but leading to an anomaly in the phonon dispersion.

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Cited by in corpus (16)

• Resonant x-ray scattering studies of charge order in cuprates
• High-temperature charge density wave correlations in La${}_{1.875}$Ba${}_{0.125}$CuO${}_4$ without spin-charge locking
• Anomalies in the pseudogap phase of the cuprates: Competing ground states and the role of umklapp scattering
• Antiferromagnetism induced by electron-phonon-coupling
• Incommensurate phonon anomaly and the nature of charge density waves in cuprates
• Charge orders, magnetism and pairings in the cuprate superconductors
• Robustness of Antiferromagnetism in the Su-Schrieffer-Heeger-Hubbard model
• Two-band superfluidity and intrinsic Josephson effect in alkaline-earth Fermi gases across an orbital Feshbach resonance
• Spatially Inhomogeneous Competition between Superconductivity and the Charge Density Wave in YBa${}_2$Cu${}_3$O${}_{6.67}$
• A functional renormalization group study of the two dimensional Su-Schrieffer-Heeger-Hubbard model
• Competition between spin-induced charge instabilities in underdoped cuprates
• Robust d-wave superconductivity from the Su-Schrieffer-Heeger-Hubbard model: possible route to high-temperature superconductivity
• Theory Perspective: SCES 2016
• The Transformation of the Superconducting Gap to an Insulating Pseudogap at a Critical Hole Density in the Cuprates
• Crucial role of Internal Collective Modes in Underdoped Cuprates
• High field charge order across the phase diagram of $YB{a}_{2}C{u}_3{O}_y$