Quantum melting of the hole crystal in the spin ladder of Sr14-xCaxCu24O41

A. Rusydi; P. Abbamonte; H. Eisaki; Y. Fujimaki; G. Blumberg; S. Uchida; G. A. Sawatzky

doi:10.1103/PhysRevLett.97.016403

Quantum melting of the hole crystal in the spin ladder of Sr14-xCaxCu24O41

A. Rusydi, P. Abbamonte, H. Eisaki, Y. Fujimaki, G. Blumberg, S. Uchida, G. A. Sawatzky

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Abstract

We have used resonant soft x-ray scattering to study the effects of discommensuration on the hole Wigner crystal (HC) in the spin ladder Sr14-xCaxCu24O41 (SCCO). As the hole density is varied the HC forms only with the commensurate wave vectors LL=1/5 and LL=1/3; for incommensurate values it "melts." A simple scaling between LL and temperature is observed, τ1/3/τ1/5=5/3, indicating an inverse relationship between the interaction strength and wavelength. Our results suggest that SCCO contains hole pairs that are crystallized through an interplay between lattice commensuration and Coulomb repulsion, reminiscent of the "pair density wave" scenario.

Original language	English (US)
Article number	016403
Journal	Physical review letters
Volume	97
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.97.016403
State	Published - 2006

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General Physics and Astronomy

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abstract = "We have used resonant soft x-ray scattering to study the effects of discommensuration on the hole Wigner crystal (HC) in the spin ladder Sr14-xCaxCu24O41 (SCCO). As the hole density is varied the HC forms only with the commensurate wave vectors LL=1/5 and LL=1/3; for incommensurate values it {"}melts.{"} A simple scaling between LL and temperature is observed, τ1/3/τ1/5=5/3, indicating an inverse relationship between the interaction strength and wavelength. Our results suggest that SCCO contains hole pairs that are crystallized through an interplay between lattice commensuration and Coulomb repulsion, reminiscent of the {"}pair density wave{"} scenario.",

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AU - Rusydi, A.

AU - Abbamonte, P.

AU - Eisaki, H.

AU - Fujimaki, Y.

AU - Blumberg, G.

AU - Uchida, S.

AU - Sawatzky, G. A.

PY - 2006

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AB - We have used resonant soft x-ray scattering to study the effects of discommensuration on the hole Wigner crystal (HC) in the spin ladder Sr14-xCaxCu24O41 (SCCO). As the hole density is varied the HC forms only with the commensurate wave vectors LL=1/5 and LL=1/3; for incommensurate values it "melts." A simple scaling between LL and temperature is observed, τ1/3/τ1/5=5/3, indicating an inverse relationship between the interaction strength and wavelength. Our results suggest that SCCO contains hole pairs that are crystallized through an interplay between lattice commensuration and Coulomb repulsion, reminiscent of the "pair density wave" scenario.

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Quantum melting of the hole crystal in the spin ladder of Sr14-xCaxCu24O41

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