Unconventional High-Energy-State Contribution to the Cooper Pairing in the Underdoped Copper-Oxide SuperconductorHgBa2Ca2Cu3O8+δ

2016/01/30 by Bastien Loret, B. Loret, Shiro Sakai +11 · 2 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Cooper pair #Copper oxide #Cuprate #Energy (signal processing) #Materials science #Oxide #Pairing #Physics #Physics of Superconductivity and Magnetism #Pseudogap #Quantum and electron transport phenomena #Quantum mechanics #Raman spectroscopy #Superconductivity #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.116.197001

published as Phys. Rev. Lett. 116, 197001 (2016) · 7 pages 4 figures

arxiv created 2016/01/30 · openalex publication_date 2016/05/11 · arxiv updated 2016/05/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We study the temperature-dependent electronic B_1g Raman response of a slightly underdoped single crystal HgBa₂Ca₂Cu₃O_8+δ with a superconducting critical temperature T_c=122 K. Our main finding is that the superconducting pair-breaking peak is associated with a dip on its higher-energy side, disappearing together at T_c. This result reveals a key aspect of the unconventional pairing mechanism: spectral weight lost in the dip is transferred to the pair-breaking peak at lower energies. This conclusion is supported by cellular dynamical mean-field theory on the Hubbard model, which is able to reproduce all the main features of the B_1g Raman response and explain the peak-dip behavior in terms of a nontrivial relationship between the superconducting gap and the pseudogap.

Citations

• Angle-resolved photoemission studies of the cuprate superconductors
• Electronic phase diagram of high-temperature copper oxide superconductors
• Cascade of phase transitions in the vicinity of a quantum critical point
• Theory of Superconductivity
• Finite Doping Signatures of the Mott Transition in the Two-Dimensional Hubbard Model
• Plaquette boson-fermion model of cuprates
• Dynamical Breakup of the Fermi Surface in a Doped Mott Insulator
• Spin-Ordering Quantum Transitions of Superconductors in a Magnetic Field
• Destruction of the Fermi surface in underdoped high-Tc superconductors
• The pseudogap in high-temperature superconductors: an experimental survey
• Phase fluctuations and spectral properties of underdoped cuprates

Cited by

• Direct connection between Mott insulators and d-wave high-temperature superconductors revealed by continuous evolution of self-energy poles
• Interplay of superconductivity and bosonic coupling in the peak-dip-hump structure of Bi2Sr2CaCu2O8+δ