Suppression of the Charge-Density-Wave State in [Formula presented] by Calcium Doping

T. Vuletić; B. Korin-Hamzić; S. Tomić; B. Gorshunov; P. Haas; T. Rõõm; M. Dressel; J. Akimitsu; T. Sasaki; T. Nagata

doi:10.1103/PhysRevLett.90.257002

Suppression of the Charge-Density-Wave State in [Formula presented] by Calcium Doping

T. Vuletić, B. Korin-Hamzić, S. Tomić, B. Gorshunov, P. Haas, T. Rõõm, M. Dressel, J. Akimitsu, T. Sasaki, T. Nagata

Research Institute for Interdisciplinary Science

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

5 Citations (Scopus)

Abstract

The charge response in the spin chain and/or ladder compound [Formula presented] 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 [Formula presented] to 10 K for [Formula presented], 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 interladder 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.

Original language	English
Pages (from-to)	4
Number of pages	1
Journal	Physical Review Letters
Volume	90
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.90.257002
Publication status	Published - 2003

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Suppression of the Charge-Density-Wave State in [Formula presented] by Calcium Doping",

abstract = "The charge response in the spin chain and/or ladder compound [Formula presented] 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 [Formula presented] to 10 K for [Formula presented], 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 interladder 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.",

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T1 - Suppression of the Charge-Density-Wave State in [Formula presented] by Calcium Doping

AU - Vuletić, T.

AU - Korin-Hamzić, B.

AU - Tomić, S.

AU - Gorshunov, B.

AU - Haas, P.

AU - Rõõm, T.

AU - Dressel, M.

AU - Akimitsu, J.

AU - Sasaki, T.

AU - Nagata, T.

PY - 2003

Y1 - 2003

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AB - The charge response in the spin chain and/or ladder compound [Formula presented] 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 [Formula presented] to 10 K for [Formula presented], 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 interladder 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.

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