Experimental Observation of the Crystallization of a Paired Holon State

2010/04/12 by Andrivo Rusydi, A. Rusydi, W. Ku +21
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Atomic physics #Boson #Charge (physics) #Charge density wave #Condensed matter physics #Cuprate #Doping #Excitation #Order (exchange) #Organic and Molecular Conductors Research #Particle physics #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Raman spectroscopy #Resonance (particle physics) #Superconductivity #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.105.026402

Accepted for publication in Physical Review Letters (4 figures)

arxiv created 2010/04/12 · openalex publication_date 2010/07/08 · arxiv updated 2015/05/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

An excitation at 201 meV is observed in the doped-hole ladder cuprate Sr₁₄Cu₂₄O₄₁, using ultraviolet resonance Raman scattering with incident light at 3.7 eV polarized along the rungs. The excitation is of charge nature, with a temperature independent excitation energy, and can be understood via an intraladder pair-breaking process. The intensity tracks closely the order parameter of the charge density wave in the ladder CDW_L, but persists above its transition temperature T_CDW_L, indicating a strong local pairing above the T_CDW_L. The 201 meV excitation vanishes in La₆Ca₈Cu₂₄O_41+\ensuremathδ, and La₅Ca₉Cu₂₄O₄₁ which are samples with no holes in the ladders. Our results suggest that the doped holes in the ladder are composite bosons consisting of paired holons that order below T_CDW.

Citations

• Superconductivity and charge-density waves in a quasi-one-dimensional spin-gap system
• An Intrinsic Bond-Centered Electronic Glass with Unidirectional Domains in Underdoped Cuprates
• Charge Modulation, Spin Response, and Dual Hofstadter Butterfly in High-TcCuprates