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.

arXiv comment5 pages, 4 figures; figures made more transparent, typos corrected, one reference added, journal-ref added

References in corpus (10)

• Hole crystallization in the spin ladder of Sr14Cu24O41
• Friedel Oscillations and Charge Density Waves in Chains and Ladders
• One- and Two-Triplon Spectra of a Cuprate Ladder
• Sliding Density-Wave in Sr_{14}Cu_{24}O_{41} Ladder Compounds
• Hole distribution for (Sr,Ca,Y,La)_14 Cu_24 O_41 ladder compounds studied by x-ray absorption spectroscopy
• Suppression of the charge-density-wave state in Sr_14Cu_24O_41 by calcium doping
• Quantum melting of the hole crystal in the spin ladder of Sr14-xCaxCu24O41
• Electronic Structure of Ladder Cuprates
• Differences Between Hole and Electron Doping of a Two-Leg CuO Ladder
• Anisotropic Charge Modulation in Ladder Planes of Sr_14-xCa_xCu_24O_41

Cited by in corpus (11)

• Diamagnetism of doped two-leg ladders and probing the nature of their commensurate phases
• Experimental observation of the crystallization of a paired holon state
• Exact solution for a quantum compass ladder
• Defect states and excitations in a Mott insulator with orbital degrees of freedom: Mott-Hubbard gap versus optical and transport gaps in doped systems
• Fidelity Study of Superconductivity in Extended Hubbard Models
• Charge and orbital order in transition metal oxides
• Macroscopic Quantum Coherence of the Spin Triplet in the Spin-Ladder Compound Sr14Cu24O41
• Pair Density Waves in coupled doped two-leg Ladders
• t-J model of coupled Cu${}_2$O${}_5$ ladders in Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$
• A light-induced charge order mode in a metastable cuprate ladder
• Charge Density Wave in Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$