Strain amplification of the 4k_F chain charge instability in Sr₁₄Cu₂₄O₄₁

2006/11/28 by Andrivo Rusydi, A. Rusydi, Peter Abbamonte +21
Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #Theoretical and Computational Physics #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.cond-mat/0611730

4 pages, 4 figures

arxiv created 2006/11/28 · openalex publication_date 2006/11/28 · arxiv updated 2009/12/01 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28

Abstract

We have used resonant soft x-ray scattering (RSXS) to study the misfit strain in Sr₁₄Cu₂₄O₄₁ (SCO), a cuprate that contains both doped spin ladders and spin chains, as well as a "control" sample without holes, La₆Ca₈Cu₂₄O₄₁ (LCCO). The misfit strain wave in SCO is strongly temperature (T)-dependent and is accompanied by a substantial hole modulation. In LCCO the strain wave is weaker, shows no hole modulation, and is T-independent. The observed strain wave vector, L_c=0.318, is close to the 4k_F instability of the chain. Our results indicate that the chain charge order observed in SCO by several groups is a 4k_F charge density wave (CDW) amplified by the misfit strain in this material. This demonstrates a new mechanism for CDW formation in condensed matter and resolves several contraversies over the transport properties of SCO.

Related

• Structural modulations in Sr₁₄ Cu₂₄ O₄₁ and their relation to charge ordering
• Decoupling of Static and Dynamic Charge Correlations revealed by Uniaxial Strain in a Cuprate Superconductor
• Observation of spin freezing and relaxation at microwave frequencies in the spin ladder compound Sr_14-xCa_xCu₂₄O₄₁
• Unconventional Transition from Metallic to Insulating Resistivity in the Spin-ladder Compound (Sr,Ca)₁₄Cu₂₄O₄₁
• Charge Density Waves and x=1/8 anomaly in La_2-x-y(Nd,Eu)_y(Ba,Sr)_xCuO₄