Origin of charge density wave in the coupled spin ladders in Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$

Abstract

We formulate a d-p multiband charge transfer model for Cu${}_2$O${}_5$ coupled spin ladders, relevant for Cu${}_2$O${}_3$ plane of Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$, and solve it using Hartree-Fock approximation. The results explain that (i) the charge density wave (CDW) with its periodicity dependent on doping is stabilized by purely electronic many-body interactions in a single spin ladder and (ii) the inclusion of the interladder interactions favors (disfavors) the stability of the CDW with odd (even) periodicity, respectively. This stays in agreement with recent experimental results and suggests the structure of the minimal microscopic model which should be considered in future more sophisticated studies.

5 pages, 4 figures; figures made more transparent, typos corrected, one reference added, journal-ref added

References in corpus (1)

• One- and Two-Triplon Spectra of a Cuprate Ladder

Cited by in corpus (6)

• Diamagnetism of doped two-leg ladders and probing the nature of their commensurate phases
• Fidelity Study of Superconductivity in Extended Hubbard Models
• Macroscopic Quantum Coherence of the Spin Triplet in the Spin-Ladder Compound Sr14Cu24O41
• Pair Density Waves in coupled doped two-leg Ladders
• Charge Density Wave in Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$
• A light-induced charge order mode in a metastable cuprate ladder