Suppression of the charge-density-wave state in Sr_14Cu_24O_41 by calcium doping

Abstract

The charge response in the spin chain/ladder compound Sr_14-xCa_xCu_24O_41 is characterized by DC resistivity, low-frequency dielectric spectroscopy and optical spectroscopy. We identify a phase transition below which a charge-density wave (CDW) develops in the ladder arrays. Calcium doping suppresses this phase with the transition temperature decreasing from 210 K for x=0 to 10 K for x=9, and the CDW gap from 130 meV down to 3 meV, respectively. This suppression is due to the worsened nesting originating from the increase of the inter-ladder tight-binding hopping integrals, as well as from disorder introduced at the Sr sites. These results altogether speak in favor of two-dimensional superconductivity under pressure.

4 pages, 4 figures, accepted for publication in PRL

References in corpus (7)

• 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
• Charge-density wave formation in Sr_{14}Cu_{24}O_{41}
• Spin dynamics of Sr_14Cu_24O_41 two-leg ladder studied by Raman spectroscopy
• Microwave and millimeter wave spectroscopy in the slightly hole-doped ladders of Sr${}_{14}$Cu${}_{24}$O${}_{41}$
• Variable-range hopping conductivity in the copper-oxygen chains of La_3Sr_3Ca_8Cu_24O_41
• Charge order induced sharp Raman peak in Sr_14Cu_24O_41

Cited by in corpus (33)

• Electrodynamics of Correlated Electron Materials
• Hole crystallization in the spin ladder of Sr14Cu24O41
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• Diamagnetism of doped two-leg ladders and probing the nature of their commensurate phases
• Heat transport of cuprate-based low-dimensional quantum magnets with strong exchange coupling
• Quantum melting of the hole crystal in the spin ladder of Sr14-xCaxCu24O41
• Collective Excitations in the Charge-Ordered Phase of alpha-(BEDT-TTF)2I3
• Electrodynamics of correlated electron matter
• Excitation spectrum of doped two-leg ladders: A field theory analysis
• Hole redistribution in Sr\_(14-x)Ca\_xCu\_24O\_41 (x = 0, 12) spin ladder compounds: ^63Cu and ^17O NMR study under pressure
• Experimental observation of the crystallization of a paired holon state
• Exact solution for a quantum compass ladder
• Resonant soft x-ray scattering, stripe order, and the electron spectral function in cuprates
• Anisotropic Charge Modulation in Ladder Planes of Sr_14-xCa_xCu_24O_41
• Collective density wave excitations in two-leg Sr_{14-x}Ca_xCu_{24}O_{41} ladders
• Origin of charge density wave in the coupled spin ladders in Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$
• Phononic gaps in the charged incommensurate planes of Sr14Cu24O41
• Orbital currents and charge density waves in a generalized Hubbard ladder
• Magnetic response and quantum critical behavior in the doped two-leg extended Hubbard ladder
• Charge-Density-Wave Formation in the Doped Two-Leg Extended Hubbard Ladder
• NMR and NQR study of pressure-induced superconductivity and the origin of critical-temperature enhancement in the spin-ladder cuprate Sr${}_2$Ca${}_{12}$Cu${}_{24}$O${}_{41}$
• Influence of doping on the Hall coefficient in Sr_{14-x}Ca_xCu_24O_41
• Underlying Fermi surface of Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$ in two-dimensional momentum space observed by angle-resolved photoemission spectroscopy
• Hole-depletion of ladders in Sr${}_{14}$Cu${}_{24}$O${}_{41}$ induced by correlation effects
• Charge density waves in Sr_14-xCa_xCu_24O_41: electron correlations vs. structural effects
• Symmetry-protected electronic metastability in an optically driven cuprate ladder
• Plasmons and Interband Transitions of Ca${}_{11}$Sr${}_3$Cu${}_{24}$O${}_{41}$ investigated by Electron Energy-Loss Spectroscopy
• Suppression of the Charge-Density-Wave State in Sr${}_{10}$Ca${}_4$Cu${}_{24}$O${}_{41}$ by External Pressure
• Polarization-dependent infrared reflectivity study of Sr${}_{2.5}$Ca${}_{11.5}$Cu${}_{24}$O${}_{41}$ under pressure: Charge dynamics, charge distribution, and anisotropy
• Evidence for an orbital dependent Mott transition in the ladders of (La,Ca)${}_x$Sr${}_{14-x}$Cu${}_{24}$O${}_{41}$ derived by electron energy-loss spectroscopy
• A light-induced charge order mode in a metastable cuprate ladder
• Effects of Ca substitution on quasi-acoustic sliding modes in Sr${}_{14-x}$Ca${}_x$Cu${}_{24}$O${}_{41}$