Relationship between hole density and charge-ordering wave vector in Sr14-x Cax Cu24 O41

A. Rusydi; M. Berciu; P. Abbamonte; S. Smadici; H. Eisaki; Y. Fujimaki; S. Uchida; M. Rübhausen; G. A. Sawatzky

doi:10.1103/PhysRevB.75.104510

Relationship between hole density and charge-ordering wave vector in Sr14-x Cax Cu24 O41

A. Rusydi, M. Berciu, P. Abbamonte, S. Smadici, H. Eisaki, Y. Fujimaki, S. Uchida, M. Rübhausen, G. A. Sawatzky

Research output: Contribution to journal › Article › peer-review

Abstract

The distribution of holes in Sr14-x Cax Cu24 O41 is revisited with semiempirical reanalysis of the x-ray absorption data and exact diagonalization cluster calculations. Another interpretation of the XAS data leads to much larger ladder hole densities than previously suggested. These new hole densities lead to a simple interpretation of the hole Wigner crystal recently reported with 1 3 and 1 5 wave vectors along the ladder. Our interpretation is consistent with paired holes in the rung of the ladders. Exact diagonalization results for a minimal model of the doped ladders suggest that the stabilization of spin structures consisting of 4 spins in a square plaquette as a result of resonance valence bond physics suppresses the hole crystal with a 1 4 wave vector.

Original language	English (US)
Article number	104510
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	75
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.75.104510
State	Published - Mar 21 2007

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.75.104510

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abstract = "The distribution of holes in Sr14-x Cax Cu24 O41 is revisited with semiempirical reanalysis of the x-ray absorption data and exact diagonalization cluster calculations. Another interpretation of the XAS data leads to much larger ladder hole densities than previously suggested. These new hole densities lead to a simple interpretation of the hole Wigner crystal recently reported with 1 3 and 1 5 wave vectors along the ladder. Our interpretation is consistent with paired holes in the rung of the ladders. Exact diagonalization results for a minimal model of the doped ladders suggest that the stabilization of spin structures consisting of 4 spins in a square plaquette as a result of resonance valence bond physics suppresses the hole crystal with a 1 4 wave vector.",

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AU - Rusydi, A.

AU - Berciu, M.

AU - Abbamonte, P.

AU - Smadici, S.

AU - Eisaki, H.

AU - Fujimaki, Y.

AU - Uchida, S.

AU - Rübhausen, M.

AU - Sawatzky, G. A.

PY - 2007/3/21

Y1 - 2007/3/21

N2 - The distribution of holes in Sr14-x Cax Cu24 O41 is revisited with semiempirical reanalysis of the x-ray absorption data and exact diagonalization cluster calculations. Another interpretation of the XAS data leads to much larger ladder hole densities than previously suggested. These new hole densities lead to a simple interpretation of the hole Wigner crystal recently reported with 1 3 and 1 5 wave vectors along the ladder. Our interpretation is consistent with paired holes in the rung of the ladders. Exact diagonalization results for a minimal model of the doped ladders suggest that the stabilization of spin structures consisting of 4 spins in a square plaquette as a result of resonance valence bond physics suppresses the hole crystal with a 1 4 wave vector.

AB - The distribution of holes in Sr14-x Cax Cu24 O41 is revisited with semiempirical reanalysis of the x-ray absorption data and exact diagonalization cluster calculations. Another interpretation of the XAS data leads to much larger ladder hole densities than previously suggested. These new hole densities lead to a simple interpretation of the hole Wigner crystal recently reported with 1 3 and 1 5 wave vectors along the ladder. Our interpretation is consistent with paired holes in the rung of the ladders. Exact diagonalization results for a minimal model of the doped ladders suggest that the stabilization of spin structures consisting of 4 spins in a square plaquette as a result of resonance valence bond physics suppresses the hole crystal with a 1 4 wave vector.

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Relationship between hole density and charge-ordering wave vector in Sr14-x Cax Cu24 O41

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